Analysis of fracture criteria for 7050 aluminum alloy with different geometries based on the elastic strain energy density

被引：9

作者：

Cao, Jun ^{[1
]}

Li, Fuguo ^{[1
]}

Wang, Qianru ^{[1
]}

Li, Pan ^{[1
]}

Chen, Han ^{[1
]}

机构：

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

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2016年 / 81卷

基金：

中国国家自然科学基金;

关键词：

Fracture behavior; Elastic strain energy density; Ductile damage; Stress-state parameters; Finite element model; DUCTILE FRACTURE; MICROVOID GROWTH; STRESS TRIAXIALITY; DAMAGE MECHANICS; MODEL; TOUGHNESS; BEHAVIOR; FAILURE; COALESCENCE; COMPONENTS;

D O I：

10.1016/j.tafmec.2015.10.007

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A fracture criterion based on the elastic strain energy density (ESED) is used in consideration of the effect of structural geometry and mechanical properties, including the ultimate tensile strength, stress intensity factor, stress concentration factor and specific surface energy. A normalized damage variable D-N is defined to represent the ductile damage within the plastic deformation zone. To investigate the fracture behavior using the energy fracture criterion, structural parts of different geometries are studied by testing 7050-T7451 aluminum alloy standard specimens: standard tensile specimen, hole specimen and compact tension specimen. Finite element models are established for each specimen, and the corresponding experimental processes are simulated. The numerical results are consistent with the experimental results. By comparing and analyzing the results, the effects of different geometries on the deformation damage and fracture process, the energy condition of crack propagation, fracture orientation and fracture morphology are discussed. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：50 / 66

页数：17

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