Analysis of ductile-brittle competitive fracture criteria for tension process of 7050 aluminum alloy based on elastic strain energy density

被引：21

作者：

Cao, Jun ^{[1
]}

Li, Fuguo ^{[1
]}

Li, Pan ^{[1
]}

Ma, Xinkai ^{[1
]}

Li, Jinghui ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 637卷

基金：

中国国家自然科学基金;

关键词：

Ductile-brittle competitive fracture criteria; Critical elastic strain energy density; Plastic deformation damage; 7050 aluminum alloy; DAMAGE; MODEL; NUCLEATION; TOUGHNESS; FAILURE; GROWTH;

D O I：

10.1016/j.msea.2015.04.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To predict the damage and fracture of material accurately in the process of large elastic-plastic deformation, this paper proposed ductile-brittle competitive fracture criteria based on elastic strain energy density (ESED), which have been proved to competitively affect fracture behavior in the analysis of metal forming process. Additionally, the ductile fracture criterion is based on continuous damage mechanics (CDM) and the brittle fracture criterion is based on fracture mechanics (FM). The analyses of deformation damage and fracture for notched and unnotched tension specimens in complex stress states have been carried out by experiment and finite element method (FEM) using the ductile-brittle competitive fracture criteria. The results from analyses on damage evolution and fracture of FEM are in good agreement with the experimental ones. The law of ductile-brittle competitive fracture has been quantitatively proved to be effective in the process of metal deformation. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：201 / 214

页数：14

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