短碳纤维增强镁基复合材料热挤压有限元模拟  

Finite element simulation of hot extrusion to the short carbon fiber reinforced magnesium matrix composites

作　　者：任富忠 吴思展 REN Fuzhong;WU Sizhan(Tongren University College of Material and Chemical Engineering,Tongren 554300)

机构地区：[1]铜仁学院材料与化学工程学院,贵州铜仁554300

出　　处：《材料研究与应用》2020年第4期259-266,共8页Materials Research and Application

基　　金：贵州省教育厅自然科学研究重点项目(黔教合KY字[2015]401);贵州省科技合作计划项目(黔科合LH字[2015]7230号);贵州省铜仁学院博士科研启动金项目(trxyDH1505)。

摘　　要：采用DEFORM-3D有限元模拟软件研究了镁基复合材料的热挤压过程,探讨了挤压过程中镁基复合材料内部应力场、应变场和温度场的变化规律及与之相对应的挤出过程中复合材料内部晶粒大小的变化规律.研究结果表明,在挤压模具定径带处有明显的应力和应变集中,温度场对于复合材料内部动态再结晶的影响弱于挤压过程中产生的应力对其的影响.The hot extrusion process of magnesium matrix composites was studied by using DEFORM-3D finite element simulation software.Variation rules of internal stress field,strain field and temperature field of magnesium matrix composites during the extrusion process were discussed.The corresponding change rules of grain size in the composites during the extrusion process were also studied.The results showed that there existed obvious stress and strain concentration in the sizing zone of the extrusion die,and the effect of the temperature field on the dynamic recrystallization of the composite was weaker than that of the stress generated during the extrusion process.

关 键 词：有限元 镁基复合材料 应力 应变 动态再结晶 

分 类 号：TB331[一般工业技术—材料科学与工程]