CN101793645A - Deformation-compensated high-strength metal sheet shear test block - Google Patents
Deformation-compensated high-strength metal sheet shear test block Download PDFInfo
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- CN101793645A CN101793645A CN200910241593A CN200910241593A CN101793645A CN 101793645 A CN101793645 A CN 101793645A CN 200910241593 A CN200910241593 A CN 200910241593A CN 200910241593 A CN200910241593 A CN 200910241593A CN 101793645 A CN101793645 A CN 101793645A
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- 238000012360 testing method Methods 0.000 title claims abstract description 85
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 9
- 238000004154 testing of material Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910000885 Dual-phase steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
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Abstract
The invention relates to a deformation-compensated high-strength metal sheet shear test block, belonging to the technical field of the mechanical property measurement. Two heart-shaped holes, the pinpoints of which are opposite to each other, are formed at the middle part of a flat sheet along the direction of the long axis, the two heart-shaped holes can be respectively offset for a certain distance in the opposite direction along the lateral axis relative to the long axis at the center of the flat sheet, and the flat sheet is notched in the oblique deviation direction from the antisymmetric positions at the far ends of the two heart shapes to the two long sides of the test block, so that only the opposite positions of the tops of the two heart shapes in the center of the flat sheet are connected and the notches of the test block presents an antisymmetric shape. When the long-axis direction of the test block is under the action of a tension, the working area in the center of the sheet is in the shearing stress state because of the special shape of the test block. The invention is applicable to the shear strength test of the high-strength metal sheet which is difficult to be subject to the local surface working, and the local shearing stress state of the flat sheet can be detected by directly using a one-way material testing machine to complete the one-way tension of the test block without being used with complicated fixtures.
Description
Technical field
The present invention relates to a kind ofly belong to the mechanical property field of measuring technique with deformation-compensated high duty metal plate shear test block,
Background technology
Shear test is the fundamental test of the mechanics of materials, is mainly used in two aspects, and one is measured modulus of shearing, shearing strength and the stress-strain relation of material, the failure damage of material under its two research shearing condition.The twisting test of cylindrical entity test specimen or thin-walled test specimen is one of typical shear test, and according to theory of mechanics of materials, the circumferential of test specimen is the pure shear deformation state, and it requires test specimen must be cylindrical, then can't use for flat test piece.The essence of making in the processing is dashed the shearing that test can realize the thin plate test specimen, but the speed that drift loads in the process of the test is often very high, is not suitable for the quasistatic research of shear property, also has the contact friction behavior between each parts, has increased the complicacy of test.In addition,, can also adopt the anchor clamps of particular design and plate is carried out surface working to make local overlap attenuation, obtain the partial cut stress state for thicker plate.But all be not suitable for the high duty metal plate with upper type, this is because high duty metal plate such as plow-steel are difficult to adopt the method for machining to carry out the local surfaces cut.
Summary of the invention
The present invention is directed to the high duty metal plate, provide a kind of with deformation-compensated high duty metal plate shear test block.It is characterized in that the outline of described test specimen is rectangular; The two ends than long central axis at test specimen are symmetrical arranged two circular holes, are used to load the anchor clamps of cupping machine; Central region at test specimen is provided with the relative heart-shaped perforate in two pinnacles, two heart-shaped perforates can dull and stereotyped relatively center transverse axis biasing certain distance, then in antisymmetry position, two heart-shaped far-end right sides along the oblique two long limits of slotting that deviate to test specimen, make that the centre of test specimen is only local continuous, the cutout profiles line at test specimen middle part is an anti-symmetric shape.
Described test specimen physical dimension scope is: long axis length L1=190～240mm, minor axis length W1=60～90mm, the thickness t of test specimen=0.5～2mm.
The range of size of two hearts of described test specimen: width W 2=10～20mm, height H=10～15mm, angle α 1=40 between two oblique lines of wedge angle part～70 °, top arc radius R1=3～10mm, place, heart-shaped pinnacle uses the automatic transition of SPL, and heart-shaped pinnacle is along the offset or dish d=0～1.5mm of transverse axis.Heart-shaped pinnacle is apart from the length L 2=1.5～10mm of test specimen central, transverse axis.
The oblique groove width scope of described test specimen is: W3=5～10mm, and fluting direction and test specimen major axis angle α 2=40～50 °.
Pinnacle, the heart-shaped right side of described test specimen connects to oblique fluting straight line, and there is a chamfering at the acute angle place that the long limit of oblique fluting and test specimen forms, its radius R 3=3～10mm.
The center of circle of described test specimen two ends circular hole and the distance D 1=20～35mm that is parallel to the limit of test specimen minor axis, the radius R 2=4～10mm of circular hole.
Beneficial effect of the present invention is: easy to use, do not need complex matched clamp, and directly utilize existing unidirectional Material Testing Machine, the unilateral stretching by test specimen can realize high duty metal plate partial cut stress state; The processing of test specimen adopts the line cutting to carry out, and can avoid the local surfaces machining that is difficult to carry out thereby the initial surface damage that can avoid machining to bring.
Description of drawings
Fig. 1 is a test specimen vertical view of the present invention;
Local shear stress cloud atlas when Fig. 2 carries out stress analysis for using finite element software to test specimen of the present invention;
Fig. 3 is the change curves of each components of stress in test specimen shearing work of the present invention zone with load deflection;
Embodiment
The invention provides a kind ofly with deformation-compensated high duty metal plate shear test block, the invention will be further described below in conjunction with description of drawings and embodiment.
Fig. 1 is a test specimen vertical view of the present invention; The material of described test specimen is a dual phase steel, and outline is rectangular, wherein, and long axis length L1=220mm, minor axis length W1=60mm, the thickness t=2mm of test specimen; The two ends than long central axis at test specimen are symmetrical arranged two circular holes, are used to load the anchor clamps of cupping machine, the center of circle of circular hole and the distance D 1=33.36mm that is parallel to the limit of minor axis, pore radius R2=7mm; Central region at test specimen is provided with the relative heart-shaped perforate in two pinnacles, heart-shaped width W 2=12.69mm, height H=11.43mm, 1=58 ° of the angle α between two oblique lines of wedge angle part, top arc radius R1=4.21mm.Heart-shaped pinnacle is along the offset or dish d=1.0mm of test specimen central, transverse axis, apart from the length L 2=2.5mm of transverse axis.Then in antisymmetry position, two heart-shaped far-end right sides along the oblique two long limits of slotting that deviate to test specimen, make only local linking to each other of centre of test specimen.Oblique groove width W3=5mm, 2=45 ° of fluting direction and test specimen major axis angle α.There is a chamfering at the acute angle place that the long limit of oblique fluting and test specimen forms, its radius R 3=5mm.
During test, the two ends of test specimen are loaded on the anchor clamps of one directional tensile test machine, testing machine applies pulling force, and the shear stress state has promptly been realized in the centre of test specimen.
This example has provided the result of the central area stress distribution that finite element simulation obtains, the local shear stress cloud atlas when Fig. 2 carries out stress analysis for using finite element software to test specimen of the present invention.Each components of stress in Fig. 3 test specimen shearing work of the present invention zone are with the change curve of load deflection.As can be seen from the figure, test specimen central area shear stress is bigger, and along with the increasing of load, because the bias of shear zone, the shear stress components that test specimen takes place before the fracture can guarantee to realize shearing condition preferably much larger than the normal stress component.
Claims (6)
1. one kind with deformation-compensated high duty metal plate shear test block, it is characterized in that the outline of described test specimen is rectangular; The two ends than long central axis at test specimen are symmetrical arranged two circular holes, are used to load the anchor clamps of cupping machine; Central region at test specimen is provided with the relative heart-shaped perforate in two pinnacles, the dull and stereotyped relatively central longitudinal axis of two heart-shaped perforates is setovered respectively along the X reverse direction, then in antisymmetry position, two heart-shaped far-end right sides along the oblique two long limits of slotting that deviate to test specimen, make that the centre of test specimen is only local continuous, the cutout profiles line at test specimen middle part is an anti-symmetric shape.
2. according to claim 1ly a kind ofly it is characterized in that test specimen long axis length L1=190～240mm, minor axis length W1=60～90mm, the thickness t of test specimen=0.5～2mm with deformation-compensated high duty metal plate shear test block.
3. according to claim 1 a kind of with deformation-compensated high duty metal plate shear test block, it is characterized in that, the range of size of two hearts of described test specimen: width W 2=10～20mm, height H=10～15mm, angle α 1=40 between two oblique lines of wedge angle part～70 °, top arc radius R1=3～10mm, place, heart-shaped pinnacle uses the automatic transition of SPL, and the relative central longitudinal axis in heart-shaped pinnacle is along the offset or dish d=0～1.5mm of transverse axis; Heart-shaped pinnacle is apart from the length L 2=1.5～5mm of transverse axis.
4. according to claim 1ly a kind ofly it is characterized in that with deformation-compensated high duty metal plate shear test block the oblique groove width scope of described test specimen is: W3=5～10mm, fluting direction and test specimen major axis angle α 2=40～50 °.
5. according to claim 1 a kind of with deformation-compensated high duty metal plate shear test block, it is characterized in that, pinnacle, the heart-shaped right side of described test specimen links to oblique fluting straight line, and there is chamfering at the acute angle place that the long limit of oblique fluting and test specimen forms, its radius R 3=3～10mm.
6. according to claim 1 a kind ofly it is characterized in that with deformation-compensated high duty metal plate shear test block, the center of circle of described test specimen two ends circular hole and the distance D 1=20～35mm that is parallel to the limit of test specimen minor axis, the radius R 2=4～10mm of circular hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910241593XA CN101793645B (en) | 2009-11-27 | 2009-11-27 | Deformation-compensated high-strength metal sheet shear test block |
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| CN200910241593XA CN101793645B (en) | 2009-11-27 | 2009-11-27 | Deformation-compensated high-strength metal sheet shear test block |
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| CN101793645A true CN101793645A (en) | 2010-08-04 |
| CN101793645B CN101793645B (en) | 2011-09-14 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439197A (en) * | 2013-08-29 | 2013-12-11 | 南京理工大学 | Shearing test piece for researching type II fracture of viscoelastic material under condition of high strain rate |
| CN103969110A (en) * | 2014-04-09 | 2014-08-06 | 北京工业大学 | Shearing resistant difference-supplementing connecting device for support |
| CN106404487A (en) * | 2016-10-08 | 2017-02-15 | 四川大学 | Rock test sample for rock shearing strength test and testing method thereof |
| CN106525569A (en) * | 2016-12-27 | 2017-03-22 | 清华大学苏州汽车研究院（相城） | Shear test specimen of high-strength metal material |
| CN107228801A (en) * | 2017-05-11 | 2017-10-03 | 上海交通大学 | A kind of sheet metal shear outside the plane performance test methods |
| CN109916686A (en) * | 2019-04-04 | 2019-06-21 | 上海交通大学 | A kind of test sample of the anisotropy breaking strength of sheet metal |
| CN114295436A (en) * | 2021-12-16 | 2022-04-08 | 齐鲁工业大学 | Shear sample and fracture strain testing method |
| CN114544390A (en) * | 2022-01-20 | 2022-05-27 | 邯郸钢铁集团有限责任公司 | Bias loading sample and method for testing shearing and wrinkling performance of plate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1359711A1 (en) * | 1985-07-09 | 1987-12-15 | Сибирский металлургический институт им.Серго Орджоникидзе | Specimen for testing materials for shear |
| SU1670506A1 (en) * | 1989-09-25 | 1991-08-15 | Государственный союзный сибирский научно-исследовательский институт авиации им.С.А.Чаплыгина | Method of non-uniform stressed state fatigue test and related specimen |
| CN100480667C (en) * | 2006-07-15 | 2009-04-22 | 大连理工大学 | Micro-stretching sample structure with elastic beam |
| CN101251453A (en) * | 2008-04-15 | 2008-08-27 | 北京航空航天大学 | Crisscross test piece with slot on arm and attenuated center section |
-
2009
- 2009-11-27 CN CN200910241593XA patent/CN101793645B/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439197A (en) * | 2013-08-29 | 2013-12-11 | 南京理工大学 | Shearing test piece for researching type II fracture of viscoelastic material under condition of high strain rate |
| CN103969110A (en) * | 2014-04-09 | 2014-08-06 | 北京工业大学 | Shearing resistant difference-supplementing connecting device for support |
| CN103969110B (en) * | 2014-04-09 | 2016-09-07 | 北京工业大学 | A kind of bearing shearing resistance difference mends attachment means |
| CN106404487A (en) * | 2016-10-08 | 2017-02-15 | 四川大学 | Rock test sample for rock shearing strength test and testing method thereof |
| CN106525569A (en) * | 2016-12-27 | 2017-03-22 | 清华大学苏州汽车研究院（相城） | Shear test specimen of high-strength metal material |
| CN107228801A (en) * | 2017-05-11 | 2017-10-03 | 上海交通大学 | A kind of sheet metal shear outside the plane performance test methods |
| CN107228801B (en) * | 2017-05-11 | 2020-01-07 | 上海交通大学 | Method for testing out-of-plane shearing performance of metal plate |
| CN109916686A (en) * | 2019-04-04 | 2019-06-21 | 上海交通大学 | A kind of test sample of the anisotropy breaking strength of sheet metal |
| CN114295436A (en) * | 2021-12-16 | 2022-04-08 | 齐鲁工业大学 | Shear sample and fracture strain testing method |
| CN114295436B (en) * | 2021-12-16 | 2023-09-19 | 齐鲁工业大学 | Shear test specimen and breaking strain test method |
| CN114544390A (en) * | 2022-01-20 | 2022-05-27 | 邯郸钢铁集团有限责任公司 | Bias loading sample and method for testing shearing and wrinkling performance of plate |
| CN114544390B (en) * | 2022-01-20 | 2023-08-29 | 邯郸钢铁集团有限责任公司 | Offset loading sample and method for testing shearing wrinkling performance of plate |
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| CN101793645B (en) | 2011-09-14 |
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