Method for rapidly acquiring impact fracture characteristics of brittle material

Abstract

The invention discloses a method for rapidly acquiring the impact fracture characteristics of a brittle material, which comprises the steps that: the serial numbers of fracture-pending finite elements are obtained through finite element positioning components; according to the serial numbers of the finite elements, discrete element generating components are used for generating 8 discrete elementsinside each finite element by means of an isoparametric inverse transformation method, and according to the scale of the discrete elements, memory spaces are allocated in an internal memory of a computer adopting the method; and kinematic and mechanic information of each finite element is transferred to the 8 discrete elements generated therein through element information transferring components so that the kinematic and mechanic information of the finite elements and the discrete elements before and after replacement are approximately equivalent; yjr information of the finite elements and the discrete elements in the internal memory are updated through element information updating components; and finally, fracture characteristics, such as crack extension, splashing of fragments and the like, of the brittle material under the action of impact load are rapidly acquired through fracture characteristic acquiring components.

Description

technical field [0001] The invention relates to a method for obtaining impact damage characteristics of materials, in particular to a method for rapidly obtaining impact damage characteristics of brittle materials. Background technique [0002] Brittle materials represented by ceramics, laminated glass, reinforced concrete, etc. have been widely used in aviation, machinery, construction and other fields, so their technical issues such as impact damage under dynamic loads have attracted more and more attention. With the in-depth study of the problem, it is necessary not only to grasp the macroscopic characteristics of the problem as a whole, but also to conduct microscopic analysis of the interested parts to reveal the damage characteristics of brittle materials such as crack propagation and fragment flying. [0003] The impact damage problem of brittle materials is essentially a complex mechanical process in which the material transforms from a continuum to a discontinuum. S...

AI Technical Summary

Problems solved by technology

[0007] (1) In the impact damage analysis of brittle materials, the large number of discrete elements leads to the huge consumption of system resources by the contact search algorithm, and the execution efficiency is very low

[0008] (2) In the impact failure analysis of brittle materials, the finite element and discrete element regions cannot be determined, resulting in difficulty in modeling static coupling methods and low execution efficiency

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