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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

Inactive Publication Date: 2010-08-04
WUXI RES INST OF APPLIED TECH TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods are not suitable for high-strength sheet metal, because it is difficult to use machining methods for local surface cutting of high-strength sheet metal such as high-strength steel

Method used

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  • Deformation-compensated high-strength metal sheet shear test block
  • Deformation-compensated high-strength metal sheet shear test block
  • Deformation-compensated high-strength metal sheet shear test block

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Embodiment Construction

[0013] The present invention provides a high-strength sheet metal shear test piece with deformation compensation. The present invention will be further described below in conjunction with the description of the drawings and specific implementation methods.

[0014] figure 1 It is a top view of the test piece of the present invention; the material of the test piece is duplex steel, and the outer contour is rectangular, wherein the length of the major axis L1=220mm, the length of the minor axis W1=60mm, and the thickness of the test piece t=2mm; Two circular holes are arranged symmetrically at both ends of a long central axis of the test piece, which are used to load the fixture of the tensile testing machine. The distance between the center of the circular hole and the side parallel to the short axis is D1=33.36mm, and the hole radius is R2 = 7mm; in the middle area of ​​the test piece, set a heart-shaped opening with two pointed tops facing each other. The width of the heart-s...

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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 [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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/24
Inventor 桂良进高付海范子杰
Owner WUXI RES INST OF APPLIED TECH TSINGHUA UNIV
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