北京科技大学学报Issue(4)：459-466,8.DOI:10.13374/j.issn1001-053x.2014.04.007
基于Gurson模型的镁合金板材温热冲压成形研究
Thermal stamping formability of magnesium alloy sheet based on the Gurson model
摘要
Abstract
Based on the Gurson damage model, the thermal stamping formability of AZ31 magnesium alloy sheet was predicted by employing finite element simulation and thermal stamping test. Taking the plastic anisotropic behavior of the AZ31 sheet into account, the Gurson damage model was implemented in the commercial finite element software ABAQUS/Explicit by using the user material sub-routine VUMAT. Parameters employed in the Gurson damage model were determined through uniaxial tensile test and numerical itera-tive computation. The evolvement and distribution of micro voids in the AZ31 sheet during thermal stamping were simulated by using ABAQUS. The internal damage evolution due to micro void growth and coalescence developed at different temperatures in the AZ31 sheet was observed by scanning electron microscopy. The predicted micro void distribution agrees well with experimental data. There-fore, this result indicates that the presented approach can be employed to predict the thermal stamping formability of metal sheet.关键词
镁合金/板材/各向异性/冲压/成形性能/数值方法/拉伸试验Key words
magnesium alloys/sheet metal/anisotropy/stamping/formability/numerical methods/tensile testing分类
矿业与冶金引用本文复制引用
王瑞泽,陈章华,臧勇..基于Gurson模型的镁合金板材温热冲压成形研究[J].北京科技大学学报,2014,(4):459-466,8.基金项目
国家重点基础研究发展计划资助项目(2008AA062104) （2008AA062104）
