MF GenYld + CrachFEM : 全面的材料塑性与失效模型
MF GenYld + CrachFEM是一款全面的材料塑性和失效本构模型软件包,基于用户自定义材料模型与多种显式有限元求解器(LS-DYNA, Abaqus, Radioss, Pam-Crash)联合应用,通过系统化材料试验和有限元方法对材料力学性能进行准确表征与模拟,预测材料在碰撞或冲压工况下的力学行为与断裂失效风险。CrachFEM采用模块化方式描述材料某一类物理特性,模块彼此互相独立,可以根据材料的力学性能进行自由组合,包括:
- 丰富的屈服准则,如Hill1948, Hill1990, Barlat1996, Barlat2000, Barlat-Lian1989, Barlat-Lege-Brem1991, Dell, Bron-Besson, Vegter等
- 随动硬化模型 Kinematic hardening model
- 塑性硬化准则,如Swift, Voce(1), Voce(2), Ghosh, Hockett-Sherby, Hardening model for polymers等,也可以直接输入硬化曲线点
- 动态应变率效应模型,如Constant strain-rate模型, Cowper-Symonds, Polymer strain-rate模型, Square strain-rate模型等,也可以直接输入不同应变率下的塑性硬化曲线
- 用于描述金属薄板断裂的成形极限曲线与颈缩后模型
- 面向2D壳单元和3D实体单元的断裂失效模型,即应力三轴度(或主应变比)与失效应变关系曲线,分为韧性剪切断裂(Ductile Shear Fracture, DSF)和韧性正向断裂(Ductile Normal Fracture, DNF),其中DSF描述延滑移面的剪切失效,DNF为裂纹尖端张开产生的断裂
CrachFEM主要用于结构件在碰撞和冲压下断裂失效预测,典型应用领域有:
热成形结构件的断裂失效,如保险杠、B柱加强板等
超高强钢碰撞断裂失效预测
铝合金的碰撞失效,如铝合金保险杠、发动机悬置等
镁合金结构断裂失效预测,如铸镁件、镁合金减震器支座等
塑料的失效预测,如前保、仪表板、车门内板等
焊点、弧焊、铆接的冲击失效预测
钛合金材料的断裂失效,如发动机叶片等
CrachFEM作为全面的材料塑性和失效本构模型,主要通过系统化材料试验获取材料的屈服准则(或屈服轨迹)、塑性硬化曲线、应变率效率、FCL成形极限曲线、韧性正向断裂和韧性剪切断裂极限曲线。系统化材料力学试验包括:单轴拉伸(准静态与动态)、叠层压缩试验、扭转试验、剪切试验、压缩试验(塑料、镁、铝等)、双向拉伸、圆孔样条拉伸、缺口样条拉伸、直角开槽样条拉伸、斜45度角圆孔开槽拉伸、三点弯曲和穿孔试验等。
CrachFEM广泛用于工程仿真中,主要客户有:Airbus Operations, Alcan Technology & Management AG, BMW AG, Ford Motor Company, Hyundai Mobis, Mercedes-Benz AG, ThyssenKrupp Steel Europe AG, Volvo Car etc.
联系
迅仿工程技术作为德国MATFEM公司在中国的唯一合作伙伴,独家负责CrachFEM产品的技术推广、技术支持与销售、工程咨询服务等。
点击查看软件介绍:CrachFEM_Flyer.pdf,相关应用案例请访问“下载”页面或联系我们(info@sharefea.com).
MF GenYld + CrachFEM is a comprehensive material and failure model that can be used in combination with commercial explicit finite element codes. It allows the characterization of various metallic and polymer materials across the coupled FE codes and across shell and solid element models. This approach of a universal material model lends itself to the use of standardized experimental and theoretical methods for the characterization of the material for FE analysis. MF GenYld + CrachFEM aims to predict the material behavior under arbitrary load cases. Therefore, a comprehensive suite of well-defined elemental tests should be carried out to feed the material model. This technique is opposed to iteratively adjusting data in calibration cycles of a component simulation.Through many successful projects with customers, MF GenYld + CrachFEM has been validated to be efficient and effective for automotive, aerospace and medical devices application.
Please do not hesitate to contact us for more information and engineering application (info@sharefea.com).