Deformation-compensated high-strength metal sheet shear test block

A technology for sheet metal and shearing specimens, which is applied in the direction of using a stable shear force to test the strength of materials, and using a stable tension/pressure test to test the strength of materials, etc. , to achieve the effect of avoiding initial surface damage, simple and convenient use, and avoiding mechanical processing
CN101793645AInactive Publication Date: 2010-08-04WUXI RES INST OF APPLIED TECH TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WUXI RES INST OF APPLIED TECH TSINGHUA UNIV
Publication Date
2010-08-04
Estimated Expiration
Not applicable Β· inactive patent

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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.
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Description

technical field

[0001] The invention relates to a high-strength sheet metal shear test piece with deformation compensation, belonging to the technical field of mechanical performance measurement. Background technique

[0002] Shear test is a basic test of material mechanics, which is mainly used in two aspects, one is to measure the shear modulus, shear strength and stress-strain relationship of materials, and the other is to study the failure and destruction of materials in shear state. The torsion test of a cylindrical solid specimen or a thin-walled specimen is one of the typical shear tests. According to the theory of material mechanics, the circumferential direction of the specimen is in a state of pure shear deformation, which requires that the specimen must be cylindrical. For flat plates Test pieces cannot be used. The fine blanking test in the manufacturing process can realize the shearing of the thin plate specimen, but the speed of the punch loading during the te...

Claims

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