玻纤增强塑料断裂失效试验与仿真研究  

Fracture Failure Experiment and Simulation Research of Glass Fiber Reinforced Plastics

作　　者：刘淼[1] 

机构地区：[1]上海汽车集团股份有限公司技术中心,上海201804

出　　处：《上海汽车》2018年第6期50-53,共4页Shanghai Auto

摘　　要：文章旨在通过研究玻纤增强PP材料的断裂失效特性表征及仿真预测,以期在汽车结构设计早期规避风险点。以PP-GF30为研究对象,首先通过全面的材料力学试验来表征其弹塑性及断裂失效行为,然后采用LS-DYNA MAT_ADD_EROSION模块中的DIEC失效模型对PP-GF30的断裂失效行为进行仿真预测。最后通过设计子系统试验对DIEC失效模型进行验证。结果表明,DIEC失效模型可以准确预测PP-GF30的断裂失效行为。该研究方法可推广到其它塑料材料的断裂失效仿真预测中。The fracture characterization and simulation prediction of glass fiber reinforced PP materials are studied. PP - GF30 is used as the research object. The elastic - plastic and fracture failure behaviors are characterized by comprehensive material mechanics tests. Then the Damage Initiation and Evolution Criteria （DIEC） material failure model in LS - DYNA is employed to simulate the fracture failure. Finally, the DIEC model is validated by the subsystem experiments. The results show that DIEC model can predict the fracture failure of PP - GF30 correctly. The theory and method introduced in this paper can be generalized to other plastic materials.

关 键 词：玻纤增强塑料 失效准则 正向断裂 剪切断裂 LS-DYNA 

分 类 号：U465.41[一般工业技术—材料科学与工程]