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CN109142036A - A kind of vertebral plate fixed plate static system bending compression test method - Google Patents

A kind of vertebral plate fixed plate static system bending compression test method Download PDF

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Publication number
CN109142036A
CN109142036A CN201811219820.4A CN201811219820A CN109142036A CN 109142036 A CN109142036 A CN 109142036A CN 201811219820 A CN201811219820 A CN 201811219820A CN 109142036 A CN109142036 A CN 109142036A
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China
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plate
load
test
vertebral
displacement
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CN109142036B (en
Inventor
许小波
蔡宝春
刘胜杰
张小曼
张清
宁静
郑晓明
卢成田
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Zhejiang Dekang Medical Instrument Ltd Co
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Zhejiang Dekang Medical Instrument Ltd Co
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

本专利公开了一种椎板固定板系统静态压缩弯曲试验方法，使用如下设备完成：一种椎板固定板系统静态压缩弯曲试验装置、试验机连接装置以及试验机，利用静压力对椎板固定板测试装置连接试验块加压，同时连续测量变化的载荷和位移，并输出位移和载荷的对应数据；所述方法包括如下步骤：步骤一、安装步骤；步骤二、实验设计步骤；步骤三、实验步骤；和步骤四、数据分析步骤；其中所述数据分析步骤包括，根据记录的载荷和位移，确定2％残余位移、压缩弯曲屈服载荷、压缩弯曲刚度、和压缩弯曲极限载荷。本试验方案依据现实手术中椎板固定板与脊柱的位置关系来装配，通过施加载荷来模拟术后开门椎板受挤压“关门”的情形，测定椎板固定板的抗弯曲能力。

This patent discloses a static compression and bending test method for a lamina fixed plate system, which is completed by using the following equipment: a static compression and bending test device for a vertebral plate fixed plate system, a connecting device for a testing machine and a testing machine, which use static pressure to fix the vertebral plate. The board testing device is connected to the test block and pressurized, while continuously measuring the changing load and displacement, and outputting the corresponding data of the displacement and the load; the method includes the following steps: step 1, installation step; step 2, experiment design step; step 3, Experimental steps; and Step 4, data analysis step; wherein the data analysis step includes, according to the recorded loads and displacements, determining 2% residual displacement, compressive bending yield load, compressive bending stiffness, and compressive bending ultimate load. This test plan is assembled according to the positional relationship between the laminar fixation plate and the spine in the actual operation, and the bending resistance of the laminar fixation plate is determined by applying a load to simulate the situation of the laminar being squeezed and "closed" after opening the door.

Description

A kind of vertebral plate fixed plate static system bending compression test method
Technical field
This patent belongs to area of medical devices, specifically, designing a kind of vertebral plate fixed plate static system bending compression examination Proved recipe method.
Background technique
Vertebral plate fixed plate system is called laminoplasty system, and vertebral plate fixed plate (as shown in Figure 1) is Intraspinal diseases patient, After laminectomy, the inner fixing device of vertebral plate reconstruction is carried out.Mainly there is simple vertebra for the treatment method of Intraspinal diseases Plate resection and laminoplasty etc..Canalis spinalis, complete resection occupy-place should sufficiently be appeared for intraspinal tube operation and release spinal cord Compressing, will also maintain spinal biomechanics stability.
The vertebral plate of " enabling side " and lateral mass are bridged by vertebral plate fixed plate, can make the vertebral plate started obtain it is postoperative at once Stability.Spinal cord can directly be depressurized and spinal cord is allowed to migrate off intervertebral and vertebra to back side by increasing canalis spinalis volume Body can be accomplished sufficiently to appear and depressurize and prevent the postoperative unstability of backbone in operation to complete indirect decompression.Laminoplasty Art avoids the wide excision of spinal posterior structure, takes into account spinal canal decompression and spinal stability, reduce spinal anterior approach and Complication such as endorchis cicatricial adhesion, and this art can sufficiently appear canalis spinalis, open surgery under the people visual field, avoid cauda equina nerve and Nerve root injury, lesion excision are extensively and thorough.
Patient's progress laminoplasty is postoperative, and the tissues such as muscle around door-hinge side can shrink the vertebral plate for squeezing and raising, if The mechanical property of vertebral plate fixed plate is insufficient, will cause in shutdown phenomenon.Postoperative close the door again is main, most serious complication. It is at present " the spinal implant test side in vertebral resection model YY/T 0857-2011 for the experimental method of spinal implant Method ", wherein test block and loading method to vertebral plate fixed system and are not suitable for.There is no be directed to vertebral plate fixed plate mechanics now The test method of performance comparison, cannot the performance of vertebral plate fixed plate to different model carry out the accurate of closing to reality use state Evaluation.
Patient's progress laminoplasty is postoperative, and the tissues such as muscle around door-hinge side can shrink the vertebral plate for squeezing and raising, if The mechanical property of vertebral plate fixed plate is insufficient, will cause in shutdown phenomenon.Postoperative close the door again is main, most serious complication This testing program is assembled according to vertebral plate fixed plate in actual surgery and the positional relationship of backbone, simulates art by applying load Back pullout (BPO) vertebral plate is squeezed the situation of " shutdown ", measures the bending resistance of vertebral plate fixed plate, mentions to the design of vertebral plate fixed plate It, can be to different materials, different model, different factories according to the testing program for foundation, while to same testing program is established Family's production vertebral plate fixed plate carries out mechanical property comparison.
Summary of the invention
This patent is based on the demand of the prior art and proposes, the technical problems to be solved by the patent is to provide A kind of vertebral plate fixed plate static system bending compression test method is with close to testing vertebra under conditions of vertebral plate fixed plate use state The respective physical performance of plate fixed plate.
In order to solve the above-mentioned technical problem the method for this patent offer includes:
A kind of vertebral plate fixed plate static system bending compression test method, which is characterized in that the method is used and such as divided into It is standby to complete: a kind of vertebral plate fixed plate static system bending compression experimental rig, in a manner of through the environment of simulation vertebral plate work Test the mechanical property of vertebral plate fixed plate, the experimental provision includes: vertebral plate fixed board test device lower bracket test block, vertebra Plate fixed plate and link block, the fixed board test device lower bracket test block of the vertebral plate and the link block are poly- using supra polymer Ethylene realizes, the tensile break strength of ultra high molecular polyethylene should be 40 ± 3Mpa, under the fixed board test device of each vertebral plate Stented test block and link block only use once；The vertebral plate fixed plate includes the first fixing end, the second fixing end and connection Connecting plate between the first fixing end and the second fixing end；Lower bracket experiment block includes pedestal and is located at pedestal two sides The erecting bed of pedestal is stretched out in along identical direction, the pedestal can be set to essentially flat shape, the peace of two sides Dress platform and the pedestal are integrally formed into the shape of " ︼ ", and the second of the vertebral plate fixed plate is fixed on the installation On platform, the quantity of vertebral plate fixed plate is two, is separately mounted on the erecting bed of two sides；It is mounted in the erecting bed two sides The first end of latter two vertebral plate fixed plate of vertebral plate fixed plate is fixed on link block；When vertebral plate fixed plate specification difference, By the link block of design different distance N (length that N is link block), to guarantee the fixed board test device lower bracket test of vertebral plate Block is consistent, it is ensured that the load arm of force is identical；The link block, the vertebral plate for described two opposite settings to be arranged in are fixed Between plate, including upper surface, lower surface and side, the upper surface are the shape of basic horizontal, and the lower surface is prominent downwards Curve out, the side surface is matched with the first end shape of the vertebral plate fixed plate, on the upper surface of the link block It is preferred that offering load location hole；The fixed top plate of the vertebral plate is fixedly installed on the inside top of the erecting bed, the installation The mounting surface shape of second end described in the inside top shape of platform and the vertebral plate fixed plate and the inside top of the erecting bed The shape of mounting surface matches；Testing machine attachment device, the attachment device include loading blocks and testing machine connecting plate；The load The upper end of block is bulk, and including the connecting hole connecting with testing machine, the lower end for stating loading blocks is formed as rod-shaped, is inserted into the company It connects in the load location hole of block；The testing machine connecting plate includes plate, and the lower end of the testing machine connecting plate is connected to test The fixing end of machine, the upper end of the testing machine connecting plate and the fixed company of the fixed board test device lower bracket test block of the vertebral plate It connects；Testing machine pressurizes to the fixed board test device joint test block of vertebral plate using static pressure, while the load of continuous measurement variation And displacement, and the corresponding data of output displacement and load；Described method includes following steps: Step 1: installation steps；Step Two, experimental design step；Step 3: experimental procedure；With Step 4: data analysis step；The wherein data analysis step packet It includes, according to the load and displacement of record, determines 2% residual displacement, bending compression yield load, bending compression rigidity and compression Beaming limit load.
Preferably, in each step of the method, Step 1: installation steps, get out vertebral plate fixed plate system experimentation dress Lower support test block and the fixed board test device joint test block of vertebral plate；And with screw by vertebral plate fixed plate and experimental provision into Luggage is matched；Vertebral plate fixed plate opening machine system test device lower bracket is fixed on testing machine connecting plate, guarantees loading blocks center and vertebra The fixed board test device link block center alignment of plate；Step 2: experimental design step, sets software environment, testing machine control is opened Software editing testing program processed, and the motion mode of the testing machine is set for displacement, and set 5mm/ for Bit andits control min；Step 3: experimental procedure, the static pressure generated using testing machine add the fixed board test device joint test block of vertebral plate Pressure, while the load and displacement of continuous measurement variation, and the corresponding data of output displacement and load.Step 4: data analysis step Suddenly, according to the load and displacement recorded in step 3, determine that 2% residual displacement, bending compression yield load, bending compression are rigid Degree and bending compression ultimate load；The load displacement data preparation that testing machine exports is obtained into vertebral plate fixed plate bending compression position Curve of load a is moved, linear fit is carried out to the initial linear portion of curve and obtains matched curve b, matched curve is carried out linear Biasing, offset or dish are 2% residual displacement, obtain bias curve c；It is displaced the intersection point ordinate of curve of load a and bias curve c For bending compression yield load, the slope of matched curve b is bending compression rigidity, is displaced the maximum of ordinate on curve of load a Value is bending compression ultimate load.
This testing program is assembled according to vertebral plate fixed plate in actual surgery and the positional relationship of backbone, by applying load It is squeezed the situation of " shutdown " to simulate postoperative enabling vertebral plate, the bending resistance of vertebral plate fixed plate is measured, to vertebral plate fixed plate Design foundation is provided, can be to different materials, different shaped according to the testing program while to same testing program is established Number, different manufacturers produce vertebral plate fixed plate and carry out mechanical property comparison.
Detailed description of the invention
Fig. 1 is the fixed board test device installation diagram of vertebral plate；
Fig. 2 is the postoperative schematic diagram of laminoplasty；
Fig. 3 is load schematic diagram；
Fig. 4 is typical load displacement curve figure.
Specific embodiment
Specific implementation of the patent mode is described in detail with reference to the accompanying drawing, it should be pointed out that the specific reality Applying mode is only the citing to this patent optimal technical scheme, can not be interpreted as the limitation to the scope of this patent.
As shown in Figure 1, providing firstly a kind of vertebral plate fixed plate static system bending compression examination in present embodiment Experiment device.The device is used to carry out mechanical test experiment for the vertebral plate fixed plate system.
The vertebral plate fixed plate system uses commonly used in repairing fixed natural Vertebral laminectomy.Using vertebral plate fixed plate During system, selecting symptom in the predetermined position of vertebra compared with heavy side is enabling side, along the interior lateral margin 2- of bilateral facet joint 9 Open seam slot at 3mm, opens Vertebral laminectomy, the saturating Vertebral laminectomy inside cortex bone of enabling side grinding to endorchis with miniature high-speed abrasive drilling mill Capsule grinds " V " shape bone slot 6, the bone groove depth to vertebral plate deep cortex, as door-hinge side with abrasive drilling on the Vertebral laminectomy of opposite side Hinge.Then vertebral plate fixed plate is connect in such a way that screw is fixed with the Vertebral laminectomy after correction.Vertebra after connection Section view is as shown in Figure 2.At this point, due to forming the vertebra after fixing, since vertebra is the main stress bone of human body, Vertebral plate fixed plate will usually undertake corresponding stress in human body, and the performance of vertebral plate fixed plate is with it under different stress It shows directly related.
Above-mentioned working method based on vertebral plate fixed plate provides firstly a kind of vertebral plate fixed plate in present embodiment Static system bending compression experimental rig tests the mechanics of vertebral plate fixed plate in a manner of through the environment of simulation vertebral plate work Performance.As shown in Figure 1, one of present embodiment vertebral plate fixed plate static system bending compression experimental rig includes: Vertebral plate fixes board test device lower bracket test block 1, vertebral plate fixed plate 2, link block 3, screw 4.
The structure of common vertebral plate fixed plate is as shown in Figure 1 comprising the first fixing end 21, the second fixing end 22 and company The connecting plate 23 being connected between the first fixing end and the second fixing end, the usual vertebral plate fixed plate are made for titanium alloy. First fixing end 21 is formed as plate mouth shape in the present embodiment comprising upper lip 211, lower lip 212, the upper lip is under The inner end of lip links together with the connecting plate 23, cuts so that the plate mouth is shaped to a substantially V-type sidewards The plate mouth in face.Wherein the first fixing end and the second fixing end are fixedly connected with the different piece of vertebral plate respectively, the vertebral plate described in this way Fixed plate just by spinal correction and is fixed up.
In the experimental provision of Fig. 1, the lower bracket experiment block includes pedestal 11 and is located at pedestal two sides along identical Direction stretch out in the erecting bed 12 of pedestal, the pedestal can be set to essentially flat shape, the erecting bed of two sides and The pedestal is integrally formed into the shape of " ︼ ".The second of the vertebral plate fixed plate is fixed on the erecting bed 12 On, as described in Figure, the quantity of the vertebral plate fixed plate is two, is separately mounted on the erecting bed of two sides.Preferably, described The fixed top plate of vertebral plate is fixedly installed on the inside top of the erecting bed, the inside top shape of the erecting bed and the vertebral plate The shape of the inside top mounting surface of the mounting surface shape and erecting bed of second end described in fixed plate matches, and the vertebral plate is solid It can be fixed up by screw between fixed board and the erecting bed.Thus firmly the vertebral plate fixed plate can be installed On the erecting bed, the installation situation of the second end of vertebral plate fixed plate in actual use is simulated.
It is mounted with that the first end of latter two vertebral plate fixed plate of vertebral plate fixed plate is fixed on connection in the erecting bed two sides As shown in Figure 1, it simulates working environment of the vertebral plate fixed plate after actually implantation as much as possible on block.For the vertebra of different model Plate fixed plate, size are different, thus it is possible to vary the fixed board test device joint test block length N of vertebral plate, to guarantee that vertebral plate is fixed Board test device lower bracket test block is consistent, it is ensured that the load arm of force is identical.
1,3 test blocks marked in Fig. 1 are high molecular polythene material, are used to prepare the ultra high molecular polyethylene of test block Tensile break strength should be (40 ± 3) Mpa, each test block is used only once.High molecular polythene block can eliminate bone Characteristic and morphometry bring influence.
The experimental provision further includes link block 3, and the link block 3 is an individual block, as shown in Figure 1, it is used for It is arranged between the vertebral plate fixed plate of described two opposite settings, the structure of the link block 3 includes upper surface, following table Face and side, the upper surface are the shape of basic horizontal, and the lower surface is general downward projection of arc curve, the side Surface can may be the V-arrangement matched with the first end shape of the vertebral plate fixed plate for plane.In the link block 3 Load location hole is preferably offered on upper surface, is connected by the load location hole with the loading blocks 7 of testing machine.It is logical in this way Overtesting machine loads corresponding test force to complete the test of the different performance of the vertebral plate fixed system.The load location hole For the load output end of location test machine loading blocks 7, it on the one hand can guarantee the stabilization that exerts a force when test, it on the other hand can be with Determine that force application location guarantees the force balance of load.
The attachment device of the experimental provision and testing machine is as shown in figure 3, the attachment device includes loading blocks 7 and test Machine connecting plate 8, the upper ends of the loading blocks 7 are bulk, and the bulk upper end includes connecting hole connect with testing machine, it is certain its Its similar connection type is also that those skilled in the art are contemplated that according to hole, for example, slot, such as being screwed.It is described The lower end of loading blocks 7 is formed as rod-shaped, in this way convenient for being combined with the lesser link block 3 of size, the rod-shaped lower end of the loading blocks It is inserted into the link block 3, it in this way can be for delivery to the experiment by the loading blocks 7 after the testing machine exerts a force On device.The testing machine connecting plate 8 includes plate, and the lower end of the testing machine connecting plate 8 is connected to the fixing end of testing machine, The lower end of the testing machine connecting plate 8 is fixedly connected with the fixed board test device lower bracket test block 1 of the vertebral plate；The fixation As long as the mode of connection can play fixed function by bolt or similar connection type.
When testing machine works, the static pressure generated using testing machine adds the fixed board test device joint test block of vertebral plate Pressure, while the load and displacement of continuous measurement variation, and the corresponding data of output displacement and load.Present embodiment according to Above-mentioned experimental provision further provides a kind of vertebral plate fixed plate bending compression test method, the method it include following step It is rapid:
Step 1: installation steps
Get out vertebral plate fixed plate system experimental device lower bracket test block and the fixed board test device joint test of vertebral plate Block；And vertebral plate fixed plate is assembled with experimental provision with screw；Vertebral plate fixed plate opening machine system test device lower bracket is fixed Onto testing machine connecting plate, guarantee that loading blocks center is aligned with the fixed board test device link block center of vertebral plate.
Step 2: experimental design step
Software environment is set, testing machine is opened and controls software MDCTest-D, edit testing program, and the test is set The motion mode of machine is displacement, and sets 5mm/min for Bit andits control.The static pressure generated using testing machine, it is solid to vertebral plate The pressurization of fixed board test device joint test block, while the load and displacement of continuous measurement variation, and pair of output displacement and load Answer data.
Step 3: experimental procedure
The static pressure generated using testing machine to the fixed board test device joint test block pressurization of vertebral plate, while continuously being surveyed Measure the load and displacement of variation, and the corresponding data of output displacement and load.
Step 4: data analysis step
According to the load and displacement recorded in step 3, determine that 2% residual displacement, bending compression yield load, compression are curved Stiffness and bending compression ultimate load；
The load displacement data that testing machine exports are input in OriginPro 2016, available vertebral plate fixed plate pressure The contracting bending displacement curve of load (a in such as Fig. 4) carries out linear fit to the initial linear portion of curve and obtains matched curve (such as In Fig. 4 b), matched curve is subjected to linear bias, offset or dish is 2% residual displacement, obtains bias curve (c in such as Fig. 4). The intersection point ordinate of curve a and straight line c is bending compression yield load, and the slope of b is bending compression rigidity, indulges and sits on a curve Target maximum value is bending compression ultimate load.
The mechanical property of the bigger vertebral plate fixed plate of bending compression yield load is better.
2% residual displacement: the residual deformation of the 0.020 times of component active length measured by loader is (see B in Fig. 4 Point), active length is 2% residual displacement multiplied by 0.02
Bending compression rigidity: by the yield load of bending compression divided by elastic displacement (see the slope of BC in Fig. 4).For vertebral plate The ability of fixed plate system attack deformation, bending compression rigidity is bigger, and mechanical property is better.
Bending compression yield load: it generates and is applied in the longitudinal direction needed for the residual deformation of 0.020 times of longitudinal component active length The compressive load (see the load of D point in Fig. 4) added, bending compression yield load is bigger, and the mechanical property of vertebral plate fixed plate is better.
Bending compression ultimate load: the maximum compression load being applied on component (see the load of E point in Fig. 4).Vertebral plate is solid Fixed board resists the maximum, force that can be resisted when bending compression deformation.

Claims (2)

1.一种椎板固定板系统静态压缩弯曲试验方法，其特征在于，所述方法使用如下设备完成：1. a static compression bending test method for a lamina fixation plate system, is characterized in that, described method uses following equipment to complete: 一种椎板固定板系统静态压缩弯曲试验装置，以通过模拟椎板工作的环境的方式来测试椎板固定板的力学性能，所述实验装置包括：椎板固定板测试装置下支架试验块、椎板固定板和连接块，所述椎板固定板测试装置下支架试验块和所述连接块使用超高分子聚乙烯来实现，超高分子聚乙烯的拉伸断裂强度应为40±3Mpa，每个椎板固定板测试装置下支架试验块和连接块只使用一次；所述椎板固定板包括第一固定端、第二固定端以及连接于第一固定端和第二固定端之间的连接板；所述下支架实验块包括底座以及位于底座两侧沿着相同的方向伸出于底座的安装台，所述底座可以设置为基本上平直的形状，两侧的安装台和所述底座整体形成为“︼”的形状，所述椎板固定板的第二固定安装固定在所述安装台上，椎板固定板的数量为两个，分别安装在两侧的安装台之上；在所述安装台两侧安装了椎板固定板之后两个椎板固定板的第一端固定在连接块上；椎板固定板规格尺寸不同时，通过设计不同距离N的连接块，其中N为连接块的长度，来保证椎板固定板测试装置下支架试验块一致，确保加载力臂相同；所述连接块，用于设置在所述两个相对的设置的所述椎板固定板之间，包括上表面、下表面和侧面，所述上表面为基本水平的形状，所述下表面为向下突出的曲线，所述侧表面与所述椎板固定板的第一端形状相配合，在所述连接块的上表面上优选开设有加载定位孔；所述椎板固定顶板固定设置于所述安装台的顶部内侧，所述安装台的顶部内侧形状与所述椎板固定板所述第二端的安装面形状与所述安装台的顶部内侧安装面的形状相配；A static compression and bending test device for a vertebral plate fixing plate system is used to test the mechanical properties of a vertebral plate fixing plate by simulating the working environment of the vertebral plate. The vertebral plate fixing plate and the connecting block, the lower bracket test block and the connecting block of the vertebral plate fixing plate testing device are realized by using ultra-high molecular weight polyethylene, and the tensile breaking strength of the ultra-high molecular weight polyethylene should be 40±3Mpa, The lower bracket test block and connecting block of each lamina fixation plate testing device are used only once; the lamina fixation plate includes a first fixed end, a second fixed end, and a connecting plate; the lower support experimental block includes a base and a mounting platform located on both sides of the base and protruding from the base along the same direction, the base can be set to a substantially straight shape, the mounting platforms on both sides and the The base is integrally formed in the shape of "︼", the second fixed installation of the vertebral plate fixing plate is fixed on the installation platform, and the number of the vertebral plate fixing plates is two, which are respectively installed on the installation platforms on both sides; After the vertebral plate fixing plates are installed on both sides of the installation platform, the first ends of the two vertebral plate fixing plates are fixed on the connecting block; when the specifications and sizes of the vertebral plate fixing plates are different, the connecting blocks with different distances N are designed, wherein N It is the length of the connecting block to ensure that the lower bracket test blocks of the vertebral plate fixing plate test device are consistent and that the loading force arm is the same; the connecting block is used to be arranged between the two opposing vertebral plate fixing plates The space includes an upper surface, a lower surface and a side surface, the upper surface is in a substantially horizontal shape, the lower surface is a downwardly protruding curve, and the side surface matches the shape of the first end of the vertebral plate fixing plate , a loading positioning hole is preferably opened on the upper surface of the connecting block; the vertebral plate fixing top plate is fixedly arranged on the inner side of the top of the installation platform, and the shape of the inner side of the top of the installation platform is the same as that of the vertebral plate fixing plate. The shape of the mounting surface of the second end matches the shape of the top inner mounting surface of the mounting platform; 试验机连接装置，所述连接装置包括加载块和试验机连接板；所述加载块的上端为块状，包括与试验机连接的连接孔，所述加载块的下端形成为杆状，插入到所述连接块的加载定位孔中；所述试验机连接板包括平板，所述试验机连接板的下端连接到试验机的固定端，所述试验机连接板的上端与所述椎板固定板测试装置下支架试验块固定连接；A connecting device for a testing machine, the connecting device includes a loading block and a connecting plate for the testing machine; the upper end of the loading block is block-shaped and includes a connecting hole for connecting with the testing machine, and the lower end of the loading block is formed into a rod shape, which is inserted into the test machine. in the loading positioning hole of the connecting block; the connecting plate of the testing machine includes a flat plate, the lower end of the connecting plate of the testing machine is connected to the fixed end of the testing machine, and the upper end of the connecting plate of the testing machine is connected to the vertebral plate fixing plate The lower bracket test block of the test device is fixedly connected; 试验机，利用静压力对椎板固定板测试装置连接试验块加压，同时连续测量变化的载荷和位移，并输出位移和载荷的对应数据；The testing machine uses static pressure to pressurize the test block connected to the lamina fixed plate test device, continuously measures the changing load and displacement, and outputs the corresponding data of the displacement and load; 所述方法包括如下步骤：The method includes the following steps: 步骤一、安装步骤；步骤二、实验设计步骤；步骤三、实验步骤；和步骤四、数据分析步骤；其中所述数据分析步骤包括，根据记录的载荷和位移，确定2％残余位移、压缩弯曲屈服载荷、压缩弯曲刚度、和压缩弯曲极限载荷。Step 1, installation step; step 2, experiment design step; step 3, experiment step; and step 4, data analysis step; wherein the data analysis step includes, according to the recorded load and displacement, determine 2% residual displacement, compression bending Yield load, compressive bending stiffness, and ultimate compression bending load. 2.根据权利要求1所述的方法，其特征在于，所述方法的步骤中，2. method according to claim 1, is characterized in that, in the step of described method, 步骤一、安装步骤Step 1. Installation steps 准备好椎板固定板系统实验装置下支架试验块与椎板固定板测试装置连接试验块；并用螺钉将椎板固定板与实验装置进行装配；将椎板固定板系统测试装置下支架固定到试验机连接板上，保证加载块中心与椎板固定板测试装置连接块中心对齐；Prepare the lower bracket test block of the lamina-fixation plate system experimental device to connect the test block with the lamina-fixation plate testing device; assemble the lamina-fixation plate and the experimental device with screws; fix the lower bracket of the lamina-fixation plate system testing device to the test device On the machine connecting plate, ensure that the center of the loading block is aligned with the center of the connecting block of the lamina fixed plate test device; 步骤二、实验设计步骤Step 2. Experiment Design Steps 设定软件环境，打开试验机控制软件编辑试验方案，并设置所述试验机的运动方式为位移，并将位移控制设置为5mm/mi n；Set the software environment, open the test machine control software to edit the test plan, set the movement mode of the test machine to displacement, and set the displacement control to 5mm/min; 步骤三、实验步骤Step three, experimental steps 利用试验机产生的静压力，对椎板固定板测试装置连接试验块加压，同时连续测量变化的载荷和位移，并输出位移和载荷的对应数据。The static pressure generated by the testing machine is used to pressurize the connecting test block of the lamina fixed plate test device, and at the same time, the changing load and displacement are continuously measured, and the corresponding data of the displacement and the load are output. 步骤四、数据分析步骤Step 4. Data analysis step 根据步骤三中记录的载荷和位移，确定2％残余位移、压缩弯曲屈服载荷、压缩弯曲刚度、和压缩弯曲极限载荷；From the loads and displacements recorded in step 3, determine the 2% residual displacement, compressive flexural yield load, compressive flexural stiffness, and compressive flexural limit load; 将试验机输出的载荷位移数据整理得到椎板固定板压缩弯曲位移载荷曲线a，对曲线的初始直线部分进行线性拟合得到拟合曲线b，将拟合曲线进行线性偏置，偏置距离为2％残余位移，得到偏置曲线c；位移载荷曲线a与偏置曲线c的交点纵坐标为压缩弯曲屈服载荷，拟合曲线b的斜率为压缩弯曲刚度，位移载荷曲线a上纵坐标的最大值为压缩弯曲极限载荷。Arrange the load and displacement data output by the testing machine to obtain the compression bending displacement load curve a of the lamina fixed plate, perform linear fitting on the initial straight line part of the curve to obtain the fitting curve b, and linearly offset the fitting curve, and the offset distance is 2% residual displacement, the offset curve c is obtained; the ordinate of the intersection of the displacement load curve a and the offset curve c is the compressive bending yield load, the slope of the fitting curve b is the compression bending stiffness, and the maximum ordinate on the displacement load curve a is the maximum The value is the ultimate compressive bending load.
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