A plate pure shear experimental loading device

A loading device, pure shearing technology, applied in measuring devices, using stable shear force to test material strength, analyzing materials, etc., can solve the problem of affecting the size of shear stress value, cannot guarantee, and the degree of influence of tensile stress cannot be quantified Description and other problems to achieve the effect of preventing wrinkling and instability

Active Publication Date: 2021-09-21
王渡初
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the progress of shear deformation, there will be additional tensile stress phenomenon in the deformation area, and the degree of influence of tensile stress cannot be described quantitatively, which not only affects the determination of the shear stress value, but also involves the determination of the shear strain value. Accurate determination, that is, it is impossible to guarantee that the material in this area is always in a state of pure shear stress during the whole loading process, which is a problem coexisting with the existing plate shear test methods

Method used

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  • A plate pure shear experimental loading device
  • A plate pure shear experimental loading device
  • A plate pure shear experimental loading device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Please refer to Figure 1-5 , a plate pure shear experiment loading device, comprising a plate test piece 1, a front loading device 14 and a rear loading device 22, the plate test piece 1 is arranged between the front loading device 14 and the rear loading device 22, to facilitate the plate test The cutting of piece 1 is convenient for use.

[0027] The front loading device 14 is provided with a front connection torsion testing machine area 21 outside, and the front connection torsion testing machine area 21 is provided with a front loading device positioning hole 15, and the front loading device 14 is provided with a front loading device positioning surface 20, and the front loading device positioning The surface 20 is provided with a front upper shear force application step 16 and a front lower shear force application step 17, and the front upper shear force application step 16 sidewall is a front loading upper shear force application wall 18, and the front...

Embodiment 2

[0034] Embodiment 2: On the basis of Embodiment 1, for the connection of the plate test piece 1 and the rear loading device 22, first, connect the upper inner fan-shaped opening 3 and the lower inner fan-shaped opening 4 of the plate test piece 1 with the rear loading device 22. The upper shear force application step 23 and the rear lower shear force application step 24 are interspersed together, so that the post-load upper shear force application wall 25 and the post-load lower shear force application wall 26 of the post-loading device 22 are connected to the plate specimen 1. The upper inner fan-shaped shear loading wall 5 and the lower inner fan-shaped shear loading wall 6 are close together, and at the same time, the inner surface 13 of the plate test piece 1 and the positioning surface 27 of the rear loading device 22 are close together without gaps, and the plate test piece The outer diameter dimensions of the inner fan-shaped openings 3 and 4 of the piece 1 are the same ...

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Abstract

The invention discloses a plate pure shear experiment loading device, which belongs to the technical field of plate mechanical performance testing, and comprises a plate test piece, a front loading device and a rear loading device, and the plate test piece is arranged between the front loading device and the rear loading device Between the front connection and torsion testing machine, there are positioning holes for the front loading device. On the positioning surface of the front loading device, there are front upper shear force application steps and front lower shear force application steps. On the rear loading device positioning surface, there are rear The upper shear force application step and the rear lower shear force application step, the positioning pin of the loading device is provided at the center of the positioning hole of the front loading device. The present invention can obtain the precise conversion relationship between the shear stress and the loading torque through the special relative position set by the front and rear loading devices, and then obtain the precise stress-strain relationship of the plate pure shear experiment. This loading method can achieve the complete shearing effect of the plate in the pure shear state.

Description

technical field [0001] The invention relates to the technical field of plate mechanical performance testing, in particular to a plate pure shear test loading device. Background technique [0002] Plates, especially rolled plates, are widely used in national economic production, especially in automobile, aircraft and shipbuilding industries. Products with different geometric shapes are finally formed by different processing techniques, for example, the most commonly used stamping forming process. [0003] In order to avoid failure phenomena such as wrinkling and cracking during the plastic processing of the sheet, it is necessary to understand the mechanical properties of the sheet used, especially with the help of computer numerical simulation technology, to simulate the formability of the sheet during the forming process, including the formation of the sheet Limit prediction, and then rational design and optimization of forming process parameters, can effectively shorten t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/02G01N3/24
CPCG01N3/02G01N3/24G01N2203/0025
Inventor 胡卫龙王渡初
Owner 王渡初
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