Experimental method based on tensile stress lasting time serving as variable, and impact experiment device

Abstract

The invention provides an experimental method based on the tensile stress lasting time serving as a variable, and relates to the field of impact dynamics. The experimental method includes S1, producing a plurality of flying sheets; S2, producing a plurality of sample targets, wherein each sample target comprises a first sample layer and a second sample layer, the first sample layers are thinner than the second sample layers, the total thicknesses and textures of the sample targets are the same, and the thicknesses of the first sample layers of the target samples are different; S3, corresponding each flying sheet to the sample targets to form an impact experiment group, wherein the sample targets in each impact experiment group are arranged adjacently; S4, performing impact experiments on the impact experiment groups. The experimental method has the advantages that the tensile stress lasting time is taken as the single variable successfully, intermediate experiment information and data in the same damage evolution path are acquired, and the influence of taking the tensile stress lasting time as the single variable on the slabbing phenomenon is predicted accurately.

Description

technical field [0001] The invention relates to the field of impact dynamics, in particular to an experimental method and an impact experimental device with tensile stress duration as a variable. Background technique [0002] Impact dynamics is a branch of mechanics based on mechanics, materials science, and physics. The main research object is the dynamic behavior and structural characteristics of materials under impact loads, including the movement and deformation of material components under dynamic loads. , damage and failure. The main application fields are: blasting engineering, drilling and mining, mechanical processing, underwater explosive cutting, weapon engineering, etc. [0003] In impact dynamics, spalling under one-dimensional strain is the most typical form of dynamic tensile fracture failure. Due to the characteristics of simple theoretical analysis and easy implementation of experiments, it also includes the response process of materials under dynamic tensi...

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used scheme in the spallation experiment is to control the duration of the tensile stress by changing the thickness of the flyer or the sample (or both at the same time), but the change caused by the duration of the tensile stress in the experiment There is a large deviation in the spallation change caused by the same value of the change in the spallation change and the theoretical tensile stress duration, which seriously affects the accuracy of the plane impact test and the subsequent analysis and research on the data

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