A kind of material shot blasting test method
An experimental method and experimental technology, applied in the analysis of materials, material analysis through optical means, instruments, etc., can solve the problem that the plastic zone does not completely conform to the real situation, the scientific research and production guidance has limited significance, and the basis for setting boundary conditions is insufficient, etc. question
Inactive Publication Date: 2020-12-29
JILIN UNIV
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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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[0024] Arrange two or more strip samples 1 with holes evenly, penetrate the bolts 2, and tighten the compression nut 5, so that all the strip samples 1 with holes are connected as a whole to imitate a whole piece of material The compression force obtained by tightening the compression nut 5 ensures that the abutment gap of the strip-shaped sample 1 with holes will not be opened or moved instantaneously during the entire experiment process.
[0025] Throw projectiles 4 toward the sample in the direction of shot blasting 3 .
[0026] Subsequently, unscrew the compression nut 5, loosen and take off the perforated strip sample 1, and on the side of the perforated strip sample 1, traces of the plastic zone 6 springing up after the pressing force is removed can be observed.
[0027] By using laser confocal microscopic analysis and other means to measure and analyze the traces 6 of the popped plastic zone, information such as the scope, area, and popped height of the plastic zone can...
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The invention relates to a material shot blasting experiment method. The material shot blasting experiment method relates to deformation treatment on the surface of the material to improve research onthe surface layer stress distribution of the material. In order to solve the indirectness problem that the existing method for analyzing by utilizing a finite element is used for analyzing a plasticarea, the invention designs a material experiment method, by which intuitive and visual plastic area range and shape information can be acquired. According to the method, two rectangular test samplesare spliced to simulate an integrated test sample, the gap between the two test samples which abut against each other tightly by sufficient force is subjected to shot blasting deformation treatment and indentation is generated, the abutting force is removed to separate the test samples, and at the moment, the bounced plastic area can be observed on the original abutting surface.
Description
technical field [0001] The invention relates to a material shot blasting experiment method. This material shot blasting experiment method involves deformation treatment on the surface of the material to improve the stress distribution of the material surface. [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 ...
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IPC IPC(8): G01N19/00G01N21/84
CPCG01N19/00G01N21/84
Inventor 王瑛玮董鑫
Owner JILIN UNIV