Study on Mechanical Properties of Non-homogeneous Materials with Defects Based on Numerical Three-Dimensional Reconstruction
Author of the article:MIAO Tianyu;RAO Lei;BAI Xue;YOU Kai
Author's Workplace：School of Mechanics and Materials,Hohai University,Nanjing 211100,China
Key Words：casting defects three-dimensional reconstruction non-homogeneous model mechanical properties
Abstract：Shrinkage and slag inclusion defects were common defects of castings,which were unevenly distributed in the casting matrix,disconnecting the continuity of materials and easily causing stress concentration and failure of parts during service.Therefore,it was the great significance to comprehensively consider the influence of heterogeneous characteristics on the mechanical properties of materials.Based on flat steel casting experiment,using the method of serial section for casting slice whole sequence images,based on digital image processing and constructed with three-dimensional space lattice defects,further space lattice mapping algorithm was adopted to establish the finite element model of heterogeneous materials,on the basis of the homogeneous and heterogeneous specimen tensile process simulation of the model.The results show that the mechanical properties of the samples can be expressed more accurately by using the heterogeneous model.
