A method for measuring yield surface under cross tension pre-deformation loading
A technology of cross tension and tensile yield strength, which is applied in the direction of applying stable tension/compression to test the strength of materials, can solve the problem of not being able to characterize the anisotropy of metal materials well, not satisfying the forming process, and not being very good Reflect stress status and other issues
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[0025] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0026] Measure the metal material yield surface with a kind of method of cross tension pre-deformation loading of the present invention to measure the yield surface, such as figure 2 As shown, it mainly includes the determination of initial yield surface 1 and subsequent yield surface 2. Let σ RD , σ TD Be respectively sheet metal rolling direction (hereinafter referred to as RD direction) and transverse direction (hereinafter referred to as TD direction) tensile yield strength, and the method steps are as follows:
[0027] Step 1: Prepare two RD direction uniaxial tensile specimens along the RD direction of the plate, prepare one TD direction uniaxial tensile specimen along the plate TD direction; prepare 11 such as figure 1 The cross tensile specimen shown;
[0028] Step 2: Take a uniaxial tensile sample prepared in the RD direction and a uniaxial tens...
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