重庆大学学报2018，Vol.41Issue(2)：37-43,7.DOI:10.11835/j.issn.1000-582X.2018.02.005
不同断裂准则下铝合金冲压成形裂纹扩展模拟
The crack propagation numerical simulation of stamping of aluminum alloy sheets under different fracture critera
摘要
Abstract
Under different pressure and different pulling speed conditions,the dynamic and the average friction coefficient of 6016 aluminum alloy sheets during the stamping process is tested by self-developed friction coefficient test equipment of metal sheets.A numerical model of aluminum alloy sheet expansion test is established with importing average friction coefficient to consider the friction boundary conditions.With taking forming limit diagram and critical thickness reduction rate as cracking criterion respectively,the numerical model is calculated by finite element method and the calculation results are verified experimentally.The results show that the crack initiation position and the crack morphology are more accord with experimental verification results when the critical thickness reduction rate is taken as cracking criterion, which proves the critical thickness reduction rate parameters obtained in this paper are suitable for analyzing the crack initration and propagation of aluminum alloy sheets in the stamping process.关键词
铝合金/摩擦系数/冲压成形/裂纹扩展/数值模拟Key words
aluminum/friction coefficient/stamping/crack propagation/numerical simulation分类
通用工业技术引用本文复制引用
万鑫铭,梁宾,赵岩,郭怡辉,周佳..不同断裂准则下铝合金冲压成形裂纹扩展模拟[J].重庆大学学报,2018,41(2):37-43,7.基金项目
重庆市基础与前沿研究计划杰出青年基金项目(cstc2013jcyjjq60001).Supported by Outstanding Youth Fund Project of Chongqing Foundation and Frontier Research Project (cstc2013jcyjjq60001). （cstc2013jcyjjq60001）
