A kind of material impact test method

Abstract

The invention relates to a material impact experiment method; the material impact experiment method relates to studies that a material is impacted to obtain good use performance and other aspects; forsolving the conventional problem of analysis of indirection of a plastic zone by a finite element analysis method, the invention discloses the material impact experiment method, that is to say, two semi-circular specimens are spliced together to imitate an overall specimen, during experiment, the two semi-circular specimens can be abutted together with a large enough force firmly, the abutting force guarantees that the abutted gap of the two semi-circular specimens does not generate an instantaneous opening or dislocation condition in the process of experiment, then the abutted gap of the twosemi-circular specimens is subjected to impact treatment, followed by the abutted force is removed and the specimens are separated, and by now, a pop-up plastic zone can be observed on an original abutted surface.

Description

technical field [0001] The invention relates to a material impact test method. This material impact test method involves the study of impacting materials to obtain good performance. [0002] technical background [0003] The technology of deforming the surface of materials has been widely used, including shot peening, rolling and hammering, and has achieved good results in practice. [0004] The principle of several existing methods is to make the material surface undergo local plastic deformation sequentially, and finally make the material surface produce the expected precompression stress layer, thereby greatly improving the static strength and fatigue strength of the part. [0005] US3661655A introduces a method of immediately shot peening hardening at least one surface of the frozen spring after dynamic loading of the elastic element, so that residual compressive stress can be generated on the surface. [0006] With the development of production, on the one hand, the pe...

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Problems solved by technology

[0011] The disadvantage is that the obtained strain data are surface data, and the change of the plastic zone occurs inside the material. The situation of the plastic zone can only be obtained indirectly through the method of finite element analysis. This method needs to set a series of boundary conditions. These boundaries The basis for setting the conditions is often not sufficient, resulting in the plastic zone obtained by the final analysis not fully conforming to the real situation, which has limited guiding significance for actual scientific research and production

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