航空材料学报2013，Vol.33Issue(1)：93-99,7.DOI:10.3969/j.issn.1005-5053.2013.1.016
延性金属渐进破坏试验与数值研究
Experimental and Numerical Study of Progressive Failure of Ductile Metals
摘要
Abstract
The investigation of progressive failure of ductile metals is valuable for accelerating the application of ductile metals and reducing the physical experiments burden. In this paper, a modified three-stress-invariant ductile fracture model is proposed based on continuum damage mechanics, where the effects of hydrostatic pressure and Lode angle on damage variable are considered. To predict the progressive failure behavior of ductile metals, a series of experiments have been conducted for high strength aluminum 2A12-T4 sheets and the proposed model is implemented into quasi-static finite element method through a compilation of user' s material subroutine VUMAT of the commercial finite element platform ABAQUS. The ductile fracture model is validated by comparing between experimental data and numerical results. It is shown that the proposed ductile fracture model can accurately and effectively predict the whole damage process of ductile metals including crack initiation, propagation and final fracture.关键词
延性金属材料/断裂/连续损伤力学/渐进破坏Key words
ductile metallic material/ fracture/ continuum damage mechanics/ progressive failure分类
通用工业技术引用本文复制引用
刘超,孙秦,刘彦杰,范学领..延性金属渐进破坏试验与数值研究[J].航空材料学报,2013,33(1):93-99,7.基金项目
国家自然科学基金(11002104)陕西省自然科学基金(2011JQ1019) （11002104）
