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WO2018162942A1 - Organe en résine renforcée par des fibres - Google Patents

Organe en résine renforcée par des fibres Download PDF

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Publication number
WO2018162942A1
WO2018162942A1 PCT/IB2017/000368 IB2017000368W WO2018162942A1 WO 2018162942 A1 WO2018162942 A1 WO 2018162942A1 IB 2017000368 W IB2017000368 W IB 2017000368W WO 2018162942 A1 WO2018162942 A1 WO 2018162942A1
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WO
WIPO (PCT)
Prior art keywords
fiber
color
frp
microcapsule
fiber material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2017/000368
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English (en)
Japanese (ja)
Inventor
裕介 長石
幸宏 濱田
太介 脇田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Priority to PCT/IB2017/000368 priority Critical patent/WO2018162942A1/fr
Publication of WO2018162942A1 publication Critical patent/WO2018162942A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection

Definitions

  • the present invention relates to a member (hereinafter referred to as FRP material) made of a fiber reinforced resin having a plurality of reinforcing fiber layers.
  • Patent Document 1 discloses a high-pressure tank inspection system in which a fiber reinforced resin layer is formed on the outer periphery of a tank container.
  • a peeling state detection sensor is installed on the outer peripheral side surface or inner peripheral side surface of the tank shoulder, and based on the signal output from the peeling state detection sensor, the fiber reinforced resin layer in the tank shoulder is placed in the fiber reinforced resin layer. Determine if delamination exists.
  • an ultrasonic transmitter and receiver a metal strain gauge, or an acoustic emission sensor is used as a peeling state detection sensor.
  • These sensors are relatively expensive and require a power source, which complicates the configuration of the inspection system, increasing the manufacturing cost of the high-pressure tank.
  • An object of the present invention is to make it possible to detect delamination without using an expensive sensor and to suppress the manufacturing cost of the FRP material.
  • One embodiment of the present invention is an FRP material in which a fiber material having a breaking strength of T1 or more and T2 or less is provided on the surface.
  • T1 is the maximum value of the breaking strength at which the fiber material is broken by a tensile load applied to the fiber material when the member is deformed with a minimum deformation amount causing delamination.
  • T2 is the minimum value of the breaking strength at which the fiber material is not broken by the tensile load applied to the fiber material when the member is deformed with the maximum deformation amount that does not cause cracks on the surface.
  • the FRP material it is not necessary to use an expensive sensor for detecting delamination, and the manufacturing cost of the FRP material can be suppressed.
  • FIG. 1A and 1B are views showing an FRP material according to a first embodiment of the present invention, in which FIG. 1A is a sectional view in the thickness direction along the extending direction of the fiber material, and FIG. 1B is a front view.
  • 2A and 2B are diagrams showing an FRP material according to a modification of the first embodiment, in which FIG. 2A is a cross-sectional view in the thickness direction along the extending direction of the fiber material, and FIG. 2B is a front view of the recess.
  • 3A and 3B are diagrams showing an FRP material according to a second embodiment of the present invention, in which FIG. 3A is a cross-sectional view in the thickness direction, and FIG.
  • FIG. 4A and 4B are diagrams showing an FRP material according to a modification of the second embodiment, in which FIG. 4A is a sectional view in the thickness direction, and FIG. 4B is a front view of a recess.
  • FIG. 5 is a cross-sectional view in the thickness direction of the FRP material according to the third embodiment of the present invention along the extending direction of the fiber material.
  • 6A and 6B are diagrams showing an FRP material according to a modification of the third embodiment, in which FIG. 6A is a sectional view in the thickness direction along the extending direction of the fiber material, and FIG. 6B is a front view of the recess. .
  • FIG. 6A is a sectional view in the thickness direction along the extending direction of the fiber material
  • FIG. 6B is a front view of the recess. .
  • FIGS. 8A and 8B are diagrams for explaining an example in which the embodiment of the present invention and modifications thereof are applied to a body side panel, where FIG. 8A is a front view and FIG. 8B is an enlarged view of a D portion of a center pillar.
  • FIG. 9 is a diagram for explaining an example in which the embodiments of the present invention and modifications thereof are applied to a side door.
  • the FRP material 10 concerning 1st Embodiment of this invention has the shape which has thickness, such as plate shape and a sheet form, as shown to Fig.1 (a).
  • the FRP material 10 is composed of a reinforcing fiber layer 1 laminated in the thickness direction and a matrix resin 2 impregnated in the reinforcing fiber layer 1.
  • Each reinforcing fiber layer 1 is formed by laminating reinforcing fiber bundles in one direction or at different angles and binding them with stitch yarns, retaining them by heat fusion without using stitch yarns, or reinforcing fiber fabrics, etc.
  • Consists of The reinforcing fibers of the reinforcing fiber layer 1 may be continuous reinforcing fibers, discontinuous reinforcing fibers, or a combination thereof.
  • carbon fibers are used as the reinforcing fibers.
  • the carbon fiber for example, polyacrylonitrile (PAN-based), pitch-based, cellulose-based, hydrocarbon-grown vapor-grown carbon fiber, graphite fiber, or the like can be used. Two or more of these fibers may be used in combination.
  • thermosetting resin or thermoplastic resin can be used as the matrix resin 2.
  • Typical examples include epoxy resins, phenol resins, unsaturated polyester resins, vinyl ester resins, polycarbonate resins, polyester resins, polyamide (PA) resins, liquid crystal polymer resins, polyether sulfone resins, polyether ether ketone resins, polyarylate.
  • polystyrene resin polystyrene resin
  • AS resin copolymer of acrylonitrile and styrene
  • ABS resin acrylonitrile, butadiene and styrene copolymer
  • modified ABS resin MBS resin (methyl methacrylate, butadiene and styrene copolymer)
  • Modified MBS resin polymethyl methacrylate (PMMA) resin, modified polymethyl methacrylate resins.
  • the FRP material 10 includes a fiber material 3 on the surface S on one side.
  • the fiber material 3 is disposed substantially parallel to the reinforcing fiber layer 1 and is formed integrally with the reinforcing fiber layer 1 and the matrix resin 2.
  • the shape / arrangement of the fiber material 3 in plan view is not particularly limited, and may be a straight line as shown in FIG. 1B, a curved line, a broken line, or the like.
  • the extending direction of the fiber material 3 is not particularly limited. When the principal stress direction when the FRP material 10 is deformed can be specified, the extending direction of the fiber material 3 is preferably matched with the principal stress direction. When the principal stress direction cannot be specified, for example, the plurality of fiber materials 3 may be arranged so that their extending directions are different from each other.
  • the fiber material 3 has a breaking strength of T1 or more and T2 or less.
  • the breaking strength is a tensile load (N) required at the time of breaking when a tensile load is applied to one fiber material 3 to break it.
  • T1 is a fiber material because the fiber material 3 is broken by a tensile load applied to the fiber material 3 when the FRP material 10 is deformed with a minimum deformation amount that causes separation between the reinforcing fiber layers 1 (delamination). 3 is the maximum value of the breaking strength required.
  • T2 is required for the fiber material 3 because the fiber material 3 is not broken by the tensile load applied to the fiber material 3 when the FRP material 10 is deformed with the maximum deformation amount that does not cause the surface S to crack. This is the minimum value of the breaking strength.
  • the deformation of the FRP material 10 is a deformation that occurs when a bending moment or the like acts on at least a part of the FRP material 10, and is a mode deformation in which a tensile load is applied to the fiber material 3.
  • the amount of deformation representing the size is a one-to-one correspondence with the elongation rate of the surface S of the FRP material 10 (that is, the elongation rate of the fiber material 3 fixed to the surface S) (%). It can be defined as the amount of change in the curvature of the material 10.
  • the tensile load applied to the fiber material 3 when the FRP material 10 is deformed by a certain deformation amount is the fiber material 3 when the fiber material 3 is stretched at an elongation rate (%) uniquely determined from the deformation amount.
  • the relationship between the elongation rate (%) of the surface S, the elongation rate (%) of the fiber material 3, and the tensile load (N) applied to the fiber material 3, and the deformation amount of the FRP material 10, T1 , T2 can be obtained through numerical calculations and experiments. “Minimum deformation amount causing delamination” and “Maximum deformation amount causing no delamination”.
  • the relationship between the elongation rate (%) of the fiber material 3 and the tensile load (N) and the relationship between the elongation rate (%) of the fiber material 3 and the tensile strength can be obtained by a tensile test of the fiber material 3. .
  • the fiber material 3 having the above breaking strength can be composed of, for example, a glass fiber bundle.
  • the form of the fiber material 3 is not particularly limited, and may be a fiber shape, a thread shape, a cloth shape, a belt shape, or the like.
  • the breaking strength of the fiber material 3 can be appropriately adjusted by changing the material, thickness, number, and the like of the fibers constituting the fiber material 3.
  • the material of the fiber is not particularly limited, and examples thereof include aramid fiber, polyester fiber, nylon fiber, acrylic fiber, rayon fiber, and polyethylene fiber in addition to the glass fiber.
  • the tensile strength of these materials is generally said to decrease in the order of aramid fiber, glass fiber, polyester fiber, nylon fiber, acrylic fiber, rayon fiber and polyethylene fiber.
  • the material of the fiber can be appropriately selected from any one of the above materials or a combination of two or more thereof according to strength characteristics required for the fiber material 3 and the like. Further, the color of the fiber material 3 is not particularly limited, but it is preferable that the fiber material 3 has a color that can be identified when compared with the surface S of the FRP material 10 in the same manner as the fiber material 3 of the modified example described later. .
  • the method of integrally forming the fiber material 3 on the surface S of the FRP material 10 is not particularly limited, and a known method such as an RTM method or a hand layup method can be employed.
  • a known method such as an RTM method or a hand layup method can be employed.
  • the RTM method first, a laminated body in which a plurality of reinforcing fiber layers 1 are laminated is set in a mold in a state in which the fiber material 3 is arranged at a site where it is desired to detect the occurrence of delamination. Next, the mold is closed and molten matrix resin 2 is injected into the cavity, and the matrix resin 2 is contained in the reinforcing fibers constituting the reinforcing fiber layers 1 and the glass fibers constituting the fiber material 3 of the laminate. Invade. Thereafter, the injected matrix resin 2 is cured by pressing and heating at the curing temperature of the matrix resin 2. Thereby, the FRP material 10 in which the fiber material 3 is integrally formed on the surface S is obtained.
  • a prepreg containing the fiber material 3 is prepared, cut into a desired shape, layered on the prepreg containing the reinforcing fiber to be the reinforcing fiber layer 1, and the impregnating resin is heated and cured to produce fibers.
  • the material 3 may be integrally formed.
  • the breaking strength of the fiber material 3 is in the range of T1 or more and T2 or less.
  • the FRP material 10 is deformed so as to cause delamination inside even if the surface S is not cracked.
  • the fiber material 3 provided on the surface S can be broken.
  • internal delamination that cannot be visually recognized from the outside can be visually detected from the outside by observing the state of the fiber material 3.
  • an expensive sensor for detecting delamination is not necessary, and the product cost can be suppressed.
  • the fiber material 3 functions as a delamination indicator that displays delamination that occurs inside the FRP material 10 and is not visible from the outside so as to be visible from the outside.
  • the fiber material 3 can be arbitrarily installed at a site where it is desired to visually detect the presence or absence of delamination, and its installation range (length, number) can also be increased or decreased according to the size of the site.
  • the fiber material 3 is provided only on the surface S on one side, but the fiber material 3 may be provided on the surface S on both sides.
  • a concave portion R is formed in the FRP material 10A.
  • the plurality of reinforcing fiber layers 1 are curved and extended along the surface S (also referred to as concave surface or inner R surface) of the concave portion R substantially in parallel with each other.
  • a first fiber material 3a and a second fiber material 3b are provided as the fiber material 3 which is a delamination indicator.
  • the fiber materials 3a and 3b extend in a curved manner along the surface S of the recess R as shown in FIG.
  • the fiber materials 3a and 3b are preferably arranged so as to cross the point P having the maximum curvature on the surface S of the recess R, but the arrangement of the fiber materials 3a and 3b is not limited to this.
  • the fiber materials 3a and 3b may be arranged parallel to each other in the front view of the recess R, or may be arranged non-parallel. Moreover, you may arrange
  • the fiber materials 3a and 3b both have a breaking strength of T1 or more and T2 or less.
  • the fiber materials 3a and 3b have different breaking strengths, and the breaking strength of the first fiber material 3a is larger than the breaking strength of the second fiber material 3b.
  • the 1st fiber material 3a can be comprised from the continuous fiber of an aramid fiber
  • the 2nd fiber material 3b can be comprised from the continuous fiber of glass fiber.
  • the fiber materials 3a and 3b have different colors, the aramid fibers of the first fiber material 3a are colored in red, and the glass fibers of the second fiber material 3b are colored in yellow. Yes.
  • a known method such as a method of performing a surface treatment using a sizing agent mixed with an inorganic pigment or an organic dye, a method of producing a yarn by dispersing a dye or a pigment in a spinning solution, etc. Can be adopted.
  • the color of the fiber materials 3a and 3b is not particularly limited as long as the color is identifiable when compared with the color of the surface S of the FRP material 10A.
  • it may be a color different from the color of the surface S of the FRP material 10A in terms of hue, saturation, brightness, etc., and may be a fluorescent color, a metallic color, or the like.
  • the FRP material 10A includes a plurality of fiber materials 3 (3a, 3b) and each has different breaking strengths, the fiber material 3 that breaks according to the deformation amount of the FRP material 10A.
  • the number (type) can be increased or decreased.
  • the fiber materials 3 (3a, 3b) having different breaking strengths have different colors, the degree of deformation generated in the FRP material 10A from the color of the broken fiber material 3, that is, the degree of delamination is easy. Can grasp. This makes it possible to easily determine whether or not an ultrasonic flaw detection inspection is necessary, whether or not a member needs to be replaced, and the like.
  • the fiber material 3 (3a, 3b) is not limited to the concave surface S, but may be provided on the convex surface S on the opposite side, or on both surfaces S.
  • a plurality of fiber materials 3 (3a, 3b) having different colors and breaking strengths can also be applied to the planar surface S as shown in FIG. In this case, the effect (2) can be obtained.
  • the FRP material 20 includes a microcapsule 4 as an delamination indicator as shown in FIG.
  • the microcapsules 4 are dispersed substantially evenly in the matrix resin 2, and a part of the microcapsules 4 penetrates into the reinforcing fiber layer 1 and is fixed to the reinforcing fibers constituting the reinforcing fiber layer 1.
  • the microcapsule 4 includes a color material 5 that is a core material and a film material 6 that encloses the color material 5.
  • the membrane material 6 of the microcapsule 4 has a tensile strength of T3 or more and T4 or less.
  • T3 is the maximum value of the tensile strength required for the film material 6 because the film material 6 is broken by the tensile load applied to the film material 6 when the FRP material 20 is deformed with the minimum deformation amount causing delamination. It is.
  • T4 is a film material because the film material 6 is not torn by the tensile load applied to the film material 6 when the FRP material 20 is deformed with the maximum deformation amount that does not cause a crack in the surface S of the FRP material 20. 6 is the minimum value of the tensile strength required.
  • the deformation of the FRP material 20 is a deformation caused by a bending moment or the like acting on at least a part of the FRP material 20, and is a mode deformation in which a tensile load is applied to the surface S on one side.
  • the amount of deformation representing the size is a pair of elongation rate of the reinforcing fiber layer 1 in the vicinity of the surface S (that is, the elongation rate of the membrane material 6 of the microcapsule 4 located in or near the reinforcing fiber layer 1) (%).
  • it can be defined as the amount of change in the curvature of the FRP material 20.
  • the tensile load applied to the film material 6 when the FRP material 20 is deformed by a certain deformation amount is the film material 6 when the film material 6 is stretched at an elongation rate (%) uniquely determined from the deformation amount.
  • the “minimum deformation amount causing delamination” and “maximum deformation amount causing no delamination” in T3 and T4 can be obtained through numerical calculations and experiments.
  • the tensile strength of the film material 6 is the tensile load (N) required at the time of breaking when a tensile load is applied to one microcapsule 4 to break it.
  • the tensile strength of the film material 6 is obtained by, for example, performing a tensile test using a test piece made of a transparent polymer material in which the microcapsules 4 are dispersed, and obtaining the nominal stress of the test piece when the microcapsules 4 are broken. It can be calculated by multiplying this nominal stress by the cross-sectional area of the microcapsule 4. In this tensile test, it is considered that the elongation percentage (%) of the test piece coincides with the elongation percentage (%) of the film material 6 until the microcapsule 4 is broken.
  • the relationship between the elongation rate (%) of the film material 6 and the tensile load (N) borne by the film material 6 and the relationship between the elongation rate (%) of the film material 6 and the tensile strength of the film material 6 are also described above. It can be determined by a tensile test.
  • the tensile strength of the film material 6 can be appropriately set by adjusting the material and thickness of the film material 6.
  • the thickness of the film material 6 can be controlled by adjusting the emulsification conditions such as the stirring speed and the polymerization conditions such as the monomer concentration, PH, and temperature. it can.
  • the material of the film material 6 is not particularly limited, and an inorganic material such as a glass material or a mineral material, or a resin material such as a thermosetting resin or a thermoplastic resin can be used.
  • Resin materials include urea resin, melamine resin, polyurethane resin, urethane-urea resin, polyamide resin, polyester resin, polyether resin, polyolefin resin, polysulfonamide resin, polysulfonate resin, epoxy resin, polycarbonate resin, phenol resin, etc.
  • an aramid resin is synthesized by reacting an aromatic diamine and an aromatic dicarboxylic acid chloride.
  • the inorganic material include silicates such as calcium silicate, magnesium silicate, zinc silicate, tin silicate, and iron silicate.
  • calcium silicate is synthesized by reacting calcium silicate with sodium silicate.
  • the material of the film material 6 can be appropriately selected from any one of the above materials or a combination of two or more thereof according to the properties of the color material 5, the strength characteristics required of the film material 6, and the like.
  • the color emitted by the color material 5 is not particularly limited as long as it can be identified when compared with the color of the surface S of the FRP material 20 side by side.
  • it may be a color different from the color of the surface S of the FRP material 20 in hue, saturation, brightness, etc., and may be a fluorescent color, a metal color, or the like.
  • the material of the color material 5 is not particularly limited, and a known pigment, dye, or the like can be employed.
  • pigments inorganic pigments such as carbon blacks and iron oxide pigments, organic pigments such as azo pigments, polycyclic pigments, dye chelates, nitro pigments, nitroso pigments and aniline black, and the surface of these pigment particles are hydrophilic.
  • water-dispersible pigments treated with a functional group-imparting agent are examples of these pigment particles.
  • dyes oil-soluble dyes, disperse dyes, water-insoluble metal-containing dyes, vat dyes, photochromic dyes, water-insoluble dyes such as resin colorants, acid dyes, direct dyes, basic dyes, water-soluble metal-containing dyes, And water-soluble dyes such as reactive dyes. Two or more of these may be used in combination.
  • the colorant 5 may be a color former that causes a chemical reaction or the like when it is released from the microcapsules 4 and develops color.
  • the method for fixing the microcapsule 4 to the reinforcing fiber is not particularly limited, and a known method such as an RTM method or a hand layup method can be employed.
  • a known method such as an RTM method or a hand layup method can be employed.
  • the microcapsules 4 may be added in advance to the molten matrix resin 2 injected into the mold.
  • the average particle size of the microcapsules 4 is preferably 0.1 ⁇ m or more from the viewpoint of improving color development, and 7 ⁇ m or less from the viewpoint of ensuring good dispersibility in the matrix resin 2. preferable.
  • the average particle size can be measured using a commercially available laser diffraction / scattering particle size distribution measuring apparatus.
  • the manufacturing method of the microcapsule 4 is not particularly limited.
  • a chemical method such as an in situ polymerization method, a submerged curing coating method, a coacervation method, a submerged curing coating method, a liquid
  • a physicochemical method such as a medium drying method and a melt dispersion cooling method
  • a mechanical method such as a pan coating method, an air suspension method, and a spray drying method
  • the FRP material 20 is deformed so as to cause delamination inside even if the surface S is not cracked.
  • the color material 5 can be released by breaking the microcapsule 4. For this reason, internal delamination that cannot be visually recognized from the outside can be visually detected from the outside by observing whether or not the microcapsules 4 are colored. As a result, an expensive sensor for detecting delamination is not necessary, and the product cost can be suppressed.
  • the weight of the FRP material 20 can be reduced without impairing the design of the FRP material 20.
  • region which provides the microcapsule 4 may be limited to the whole FRP material 20, but to a one part area
  • the structure in which the microcapsule 4 is fixed to the reinforcing fiber is limited to a specific portion by injecting the molten matrix resin 2 to which the microcapsule 4 has been added only in a portion where it is desired to detect the occurrence of delamination. Can be provided.
  • a part of the FRP material 20A specifically, a region near the surface S (also referred to as a concave surface or an inner R surface) of the concave portion R is used.
  • a microcapsule 4 is embedded.
  • the microcapsule 4 of the FRP material 20A includes a plurality of types of microcapsules, and includes a first microcapsule 4a and a second microcapsule 4b. Although illustration is omitted, the first microcapsule 4a is composed of a first color material as a core material and a first film material containing the first color material, and the second microcapsule 4b is a core material. And a second film material containing the second color material.
  • Both the first and second film materials have a tensile strength of T3 or more and T4 or less.
  • the first film material and the second film material have different tensile strengths, and the tensile strength of the first film material is larger than the tensile strength of the second film material.
  • the first film material can be made of a resin material such as an aramid resin
  • the second film material can be made of a glass-based material.
  • the first color material and the second color material have different colors, the first color material has a red color, and the second color material has a blue color.
  • the FRP material 20A includes a plurality of types of microcapsules 4 (4a, 4b), and the membrane material 6 has a different tensile strength for each type of microcapsule 4.
  • the types of microcapsules 4 to be destroyed can be increased or decreased.
  • the color material 5 of the plurality of types of microcapsules 4 (4a, 4b) has a different color for each type of microcapsule 4, the color generated from the broken microcapsule 4 is generated in the FRP material 20A.
  • the degree of deformation that is, the degree of delamination can be easily grasped. This makes it possible to easily determine whether or not an ultrasonic flaw detection inspection is necessary, whether or not a member needs to be replaced, and the like.
  • the microcapsule 4 (4a, 4b) is not limited to the region in the vicinity of the concave surface S, but is not limited to the region in the vicinity of the convex surface S on the opposite side or a part of the region. You may arrange
  • the FRP material 30 includes the fiber material 3 to which the microcapsules 4 are fixed as the delamination indicator.
  • the arrangement, shape, material and the like of the fiber material 3 those described in the first embodiment can be adopted.
  • the breaking strength of the fiber material 3 is in the range of T1 or more and T2 or less.
  • the microcapsule 4 enters the inside of the fiber material 3 (fiber gap) and is fixed to the fibers of the fiber material 3.
  • the material of the film material 6 of the microcapsule 4 and the material of the color material 5 those described in the second embodiment can be adopted.
  • the tensile strength of the membrane material 6 is set to a value at which the membrane material 6 can be broken by a tensile load applied to the membrane material 6 when the fiber material 3 breaks. This tensile strength can be obtained by a tensile test of the fiber material 3 to which the microcapsules 4 are fixed.
  • the method for integrally forming the fiber material 3 to which the microcapsules 4 are fixed on the surface S of the FRP material 30 is not particularly limited, and a known method such as an RTM method or a hand layup method can be employed.
  • the microcapsules 4 may be added in advance to the molten matrix resin 2 to be injected into the site where the fiber material 3 is installed.
  • a prepreg including the fiber material 3 and the microcapsule 4 is manufactured, cut into a desired shape, and superimposed on the prepreg to be the reinforcing fiber layer 1 to heat and cure the impregnating resin. 3 may be integrally formed.
  • the breaking strength of the fiber material 3 is in the range of T1 or more and T2 or less, the effect (1) can be obtained. Furthermore, in this embodiment, the microcapsule 4 is fixed to the fiber material 3, and the membrane material 6 of the microcapsule 4 is applied with a tensile load applied to the membrane material 6 when the fiber material 3 is broken. Since the fiber material 3 is broken, the microcapsule 4 is broken and the color material 5 is released. Thereby, the breakage of the fiber material 3 becomes easier to visually recognize.
  • the FRP material 30 ⁇ / b> A has a recess R, and a third fiber material 3 c and a fourth fiber material 3 d are formed on the surface S of the recess R as the fiber material 3 that is an delamination indicator. Is provided.
  • the arrangement, shape, material, and the like of the fiber materials 3c and 3d are the same as those of the fiber materials 3a and 3b described above.
  • the breaking strengths of the fiber materials 3c and 3d are both in the range of T1 or more and T2 or less, and the breaking strength of the third fiber material 3c is larger than the breaking strength of the fourth fiber material 3d.
  • the difference in breaking strength between the third fiber material 3c and the fourth fiber material 3d may be approximately the same as the difference in breaking strength between the first fiber material 3a and the second fiber material 3b.
  • the color of the third fiber material 3c and the color of the fourth fiber material 3d may be the same.
  • the third microcapsule 4c is fixed to the third fiber material 3c
  • the fourth microcapsule 4d is fixed to the fourth fiber material 3d.
  • the microcapsules 4c and 4d respectively enter the fiber materials 3c and 3d (fiber gaps) and are fixed to the fibers of the fiber materials 3c and 3d.
  • the membrane material 6 of the microcapsule 4c has a tensile strength at which the membrane material 6 is broken by a tensile load applied to the membrane material 6 when the fiber material 3c is broken.
  • the membrane material 6 of the microcapsule 4d has a tensile strength that allows the membrane material 6 to be broken by a tensile load applied to the membrane material 6 when the fiber material 3d is broken.
  • the color material 5 of the microcapsules 4c and 4d has a different color for each of the fiber materials 3c and 3d, the color material 5 of the microcapsule 4c has a red color, and the color material 5 of the microcapsule 4d has a blue color. Yes.
  • the material of the color material 5 the material described in the second embodiment can be adopted.
  • the FRP material 30A includes a plurality of fiber materials 3 (3c, 3d), and each of them has different breaking strengths, the fiber material 3 that breaks according to the deformation amount of the FRP material 30A.
  • the number (type) can be increased or decreased.
  • the color material 5 of the microcapsule 4 (4c, 4d) has a different color for each fiber material 3 (3c, 3d)
  • the color generated from the broken microcapsule 4 is generated in the FRP material 30A.
  • the degree of deformation that is, the degree of delamination can be easily grasped. This makes it possible to easily determine whether or not an ultrasonic flaw detection inspection is necessary, whether or not a member needs to be replaced, and the like.
  • the fiber material 3 (3c, 3d) provided with the microcapsule 4 (4c, 4d) is not limited to the concave surface S, but on the opposite convex surface S or both surfaces S. It may be provided. Further, in the present modification, the plurality of fiber materials 3 (3c, 3d) have different breaking strengths, and the color of the color material 5 of the microcapsule 4 (4c, 4d) fixed thereto is the fiber material 3 A different configuration for each (3c, 3d) can also be applied to the planar surface S as shown in FIG. In this case, the effect (9) can be obtained.
  • a side sill 40 (FIG. 7) made of FRP.
  • the above-described embodiment and modification are suitable for the concave surface 41 (surface of the concave portion) of the bent portion formed on the flange base A and the corner portions B and C of the sill inner and sill outer, the surface 42 other than the concave surface 41, and the like. Can be applied to. Thereby, it is possible to detect the occurrence of delamination when a collision load is input to the side sill 40 from the outside.
  • the concave surface can be formed at a desired position of the FRP material.
  • the concave surface 41 that is originally inside the side sill 40 is formed on the outer surface of the side sill 40 by giving a shape that is concave toward the outside to a part of the side sill 40 as in the corner portion C of FIG. It can also be provided. If the above-described embodiment is applied to the concave surface provided on the outer surface of the FRP material, delamination can be easily and accurately detected from the outside of the FRP material.
  • the FRP material to which the above-described embodiment or the like is applied may be, for example, a body side panel 50 (FIG. 8) or a door 60 (FIG. 9) made of FRP.
  • the above-described embodiment and the like are suitable for the concave surfaces 51 and 61 (surfaces of the concave portions) of the stepped portion formed on the door mounting portion D such as a pillar and the hinge portion E of the door 60 and the surfaces other than the concave surfaces 51 and 61. Can be applied to. Thereby, it is possible to accurately detect the occurrence of delamination when a collision load is input to the body side panel 50 or the door 60 from the outside.
  • two types of fiber materials 3 (3a, 3b; 3c, 3d) having different colors or breaking strengths are used, but there are three types of fiber materials 3. It may be the above.
  • two types of microcapsules 4 (4a, 4b; 4c, 4d) having different colors of the color material 5 or different tensile strengths of the film material 6 are used.
  • the material of the reinforcing fiber is not limited to this.
  • the reinforcing fiber for example, glass fiber, polyaramid fiber, alumina fiber, silicon carbide fiber, boron fiber, silicon carbide fiber and the like can be used in addition to carbon fiber. Two or more of these fibers may be used in combination.
  • the vehicle member such as a side sill is given as an example of the FRP material adopting the embodiment of the present invention, but it is used for other applications such as railways / aircrafts / ships, architecture, furniture, models, sports.
  • the present invention can also be applied to FRP materials.

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Abstract

L'invention concerne un matériau FRP (10, 10A, 20, 20A, 30, 30A, 40, 50, 60) comprenant un matériau fibreux (3, 3a, 3b, 3c, 3d) ayant une résistance à la rupture supérieure ou égale à T1 et inférieure ou égale à T2 sur une surface (S) de celui-ci. T1 représente une valeur maximale d'une résistance à la rupture à laquelle le matériau fibreux est rompu par une charge de traction appliquée au matériau fibreux lorsque le matériau FRP est déformé avec une quantité de déformation minimale provoquant une séparation intercouche. T2 représente une valeur minimale d'une résistance à la rupture à laquelle le matériau fibreux n'est pas rompu par une charge de traction appliquée au matériau fibreux lorsque le matériau FRP est déformé avec une quantité de déformation maximale ne provoquant aucune fissure dans la surface.
PCT/IB2017/000368 2017-03-09 2017-03-09 Organe en résine renforcée par des fibres Ceased WO2018162942A1 (fr)

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PCT/IB2017/000368 WO2018162942A1 (fr) 2017-03-09 2017-03-09 Organe en résine renforcée par des fibres

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60161544A (ja) * 1984-02-01 1985-08-23 Mazda Motor Corp Ｆｒｐ部材の疲労破壊検出装置
JPH093745A (ja) * 1995-06-19 1997-01-07 Toray Ind Inc 補強繊維シートおよびコンクリート構造物
JP2008291906A (ja) * 2007-05-24 2008-12-04 Toyota Motor Corp タンク
EP2537666A1 (fr) * 2011-06-20 2012-12-26 Latvijas Universitates agentura "Latvijas Universitates Polimeru mehanikas Instituts" Procédé de fabrication d'un revêtement à indication d'impacts sur la surface d'un article fabriqué à partir de matériaux composites
WO2015151549A1 (fr) * 2014-03-31 2015-10-08 本田技研工業株式会社 Structure de carrosserie de véhicule pour automobile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60161544A (ja) * 1984-02-01 1985-08-23 Mazda Motor Corp Ｆｒｐ部材の疲労破壊検出装置
JPH093745A (ja) * 1995-06-19 1997-01-07 Toray Ind Inc 補強繊維シートおよびコンクリート構造物
JP2008291906A (ja) * 2007-05-24 2008-12-04 Toyota Motor Corp タンク
EP2537666A1 (fr) * 2011-06-20 2012-12-26 Latvijas Universitates agentura "Latvijas Universitates Polimeru mehanikas Instituts" Procédé de fabrication d'un revêtement à indication d'impacts sur la surface d'un article fabriqué à partir de matériaux composites
WO2015151549A1 (fr) * 2014-03-31 2015-10-08 本田技研工業株式会社 Structure de carrosserie de véhicule pour automobile

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