Towards Energetic Consistent Transition from Damage to Fracture

摘要：

　　From the theoretical point of view,an energetically transition from damage to fracture should occur for totally damaged material.Nevertheless,in terms of numerical simulation,this condition leads to a singularity in the constitutive equations,when the Lemaitre model for ductile damage is used to describe material behavior.In this work,a cohesive law is inserted in a previous developed model for the transition of damage to fracture using XFEM in order to overcome this limitation.An exponential type of cohesive law is assumed,but its defining parameters are not considered to be a characteristic of the material but are rather fitted to fulfill energetic requirements.The efficiency of the proposed approach is tested in various numerical examples.

关键词： Ductile Fracture XFEM Cohesive Zone

作者: Mariana R.R.Seabra José M.A.Cesar de Sa

作者单位: University of Porto-Faculty of Engineering,Rua Dr,Roberto Frias,4200-456 Porto,PORTUGAL

会议类型: 国际会议

会议名称: the 11th International Conference on Numerical Methods in Industrial Forming Processes(第十一届工业成形过程中的数值模拟方法国际学术会议)(NUMIFPRM 2013)

会议地点: 沈阳

会议语种:英文

页码: 671-676

在线出版日期: 2013-07-06（万方平台首次上网日期，不代表论文的发表时间）