SU147350A1 - Method for determining crack sensitivity of high-strength sheet structural materials - Google Patents
Method for determining crack sensitivity of high-strength sheet structural materialsInfo
- Publication number
- SU147350A1 SU147350A1 SU738372A SU738372A SU147350A1 SU 147350 A1 SU147350 A1 SU 147350A1 SU 738372 A SU738372 A SU 738372A SU 738372 A SU738372 A SU 738372A SU 147350 A1 SU147350 A1 SU 147350A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- structural materials
- sheet structural
- strength sheet
- crack sensitivity
- determining crack
- Prior art date
Links
- 239000000463 material Substances 0.000 title description 7
- 238000000034 method Methods 0.000 title description 5
- 230000035945 sensitivity Effects 0.000 title description 5
- 238000012360 testing method Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Description
Известен способ определени чувствительности к образованию трещин высокопрочной конструкционной -стали при статическом изгибе плоского надрезанного образца.A known method for determining the sensitivity to the formation of cracks of a high-strength structural steel during static bending of a flat notched specimen.
Предлагаемый способ определени чувствительности к трещине высокопрочных листовых конструкционных материалов заключаетс в испытании на раст жение образца с трещинами, образованными при статическом раст жении с эксцентрицитетом образца с надрезами.The proposed method for determining the crack sensitivity of high-strength sheet structural materials is to test a sample with cracks formed by static stretching with an eccentricity of a sample with notches.
Цель изобретени -повыщение точности результатов, :получаемых при испытании. На фиг. 1 изображен испытуемый образец с надрезами , вид сверху; на фиг. 2-образец с образованными трещинами, вид сверху.The purpose of the invention is to improve the accuracy of the results: obtained by testing. FIG. 1 shows the test specimen with notches, top view; in fig. Sample 2 with formed cracks, top view.
Плоский образец / с надрезами 2 раст гиваетс внецентренной нагрузкой Р, приложенной через отверсти 5, до по влени трещины 4 в надрезах. Длина трещины измер етс в процессе раст жени . Трещина может быть получена на одной стороне образца, но небольшое раст жение с другой стороны образца необходимо дл его выравнивани . Поэтому через отверстие 5 производ т . дополнительное раст жение. После получени трещин у образца отрезают концы на головках и снимают часть материала до дна надреза. Образец становитс гладким, но с трещинами 4. Замерив площадь образца 1, за вычетом площади, занимаемой трещинами, образец / испытывают на раст жение. Степень снижени прочности на образцах с трещиной, ио сравнению с исходны .м материалом без трещины, характеризует чувствительность испытуемого-материала к трещине. При испытани х вышеописанным способом было установлено, что критическа длина трещины при в зком состо нии материала ( + 20°) составл ет 20-30% щирины испытуемого образца. При хрупком разрушении (-196°) прочность материала резко понижена, но она не зависит от длины трещины.The flat specimen / with notches 2 is stretched by an eccentric load P applied through holes 5 to the occurrence of a crack 4 in the notches. The crack length is measured during the stretching process. A crack can be made on one side of the specimen, but a slight stretch on the other side of the specimen is necessary to level it. Therefore, through hole 5 is produced. extra stretch. After cracking the sample, the ends are cut off on the heads and a portion of the material is removed to the bottom of the cut. The sample becomes smooth, but cracked. 4. By measuring the area of sample 1, minus the area occupied by the cracks, the sample / is tested for stretching. The degree of reduction in strength on samples with cracks, compared with the initial material without a crack, characterizes the sensitivity of the test material to the crack. When tested in the manner described above, it was found that the critical crack length in viscous material state (+ 20 °) is 20-30% of the width of the test specimen. With brittle fracture (-196 °), the strength of the material is sharply reduced, but it does not depend on the crack length.
№ 147350№ 147350
Предмет изобретени Subject invention
Способ определени чувствительности к трещине высокопрочных листовых конструкционных материалов, о тл и ч а ю щ и и с тем, что, с целью повышени точности получаемых результатов, провод т испытание :на раст жение образца с трещинами, образованными при статическом раст жении с эксцентрицитетом образца с надрезами.The method for determining the crack sensitivity of high-strength sheet structural materials, o and t and so that, in order to improve the accuracy of the results obtained, the test is performed: to stretch a specimen with cracks formed by static stretching with an eccentricity of the specimen with notches.
-2-2
1,/ /2 /12 /
/ / J 7Z // J 7Z
оГ±oG ±
/ 2/ 2
Л,L,
Фиг.11
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU738372A SU147350A1 (en) | 1961-07-14 | 1961-07-14 | Method for determining crack sensitivity of high-strength sheet structural materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU738372A SU147350A1 (en) | 1961-07-14 | 1961-07-14 | Method for determining crack sensitivity of high-strength sheet structural materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU147350A1 true SU147350A1 (en) | 1961-11-30 |
Family
ID=48302728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU738372A SU147350A1 (en) | 1961-07-14 | 1961-07-14 | Method for determining crack sensitivity of high-strength sheet structural materials |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU147350A1 (en) |
-
1961
- 1961-07-14 SU SU738372A patent/SU147350A1/en active
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