基于VUMAT的先进高强度双相钢车身板的拉弯剪切断裂模拟  

Simulation of Shear Fracture on Advanced High-strength Dual-Phase Steels during Stretch-bending Based on VUMAT

作　　者：吕庆龙[1] 孙彩凤[1] 赵连星 李迪[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,山东省淄博市255049

出　　处：《农业装备与车辆工程》2015年第4期36-40,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：先进高强度双相钢在小半径拉弯成形中易发生剪切断裂。而传统的方法,如成形极限图(FLD),无法预测这种类型的断裂形式。将在岩土方面应用广泛的Mohr-Coulomb模型用来分析在拉伸弯曲过程中双相钢板的失效行为。基于ABAQUS/Explicit平台的用户材料子程序(VUMAT)接口,开发了基于Hill’48各向异性屈服准则的修正Mohr-Coulomb模型子程序,通过槽型件的拉伸弯曲算例,验证了子程序的正确性及有效性。分析结果表明,Hill’48-MMC模型可以预测先进高强度双相钢的剪切断裂。Advanced high-strength dual-phase steels often observe shear fracture on tight radii during stamping processes.While traditional approaches, such as the Forming Limit Diagram（FLD）, are unable to predict this type of fractures. In this paper, Mohr – Coulomb model used widely in the geotechnical aspects is used to analyze the failure behavior of a Dual Phase（DP） steel sheet during stretch-bending operations. User material subroutine VUMAT in the finite element software ABAQUS /Explicit is developed by the Modified Mohr – Coulomb model based on Hill＇48 anisotropic yield criterion, the groove-shape dies＇ stretch-bending case are analyzed to verify the correctness and efficiency of the developed material subroutine. The analysis results show that the Hill ＇48-MMC model can predict shear fracture of advanced high-strength dual-phase steel on tight radii during stamping processes.

关 键 词：先进高强度双相钢 剪切断裂 拉伸弯曲 修正Mohr-Coulomb 用户材料子程序 

分 类 号：U463.82[机械工程—车辆工程] TG142.15[交通运输工程—载运工具运用工程]