液-固挤压Al_2O_(3sf)/LY12复合材料管材成形过程的数值模拟  

NUMERICAL SIMULATION ON THELIQUID-SOLID EXTRUSIONPROCESS FOR FORMING Al_2O_(3sf)/LY12COMPOSITE TUBES

作　　者：齐乐华[1] 崔培玲[1] 史忠科[1] 李贺军[1] 

机构地区：[1]西北工业大学机械系,西安710072

出　　处：《机械工程学报》2002年第7期102-106,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50175091);航空科学基金(99G53087);西北工业大学博士论文创新基金资助项目。

摘　　要：针对液-固挤压复合材料管材的成形过程,采用热刚塑性准耦合有限元法进行了数值模拟,以揭示其塑性变形行为。通过自行开发的有限元模拟系统软件,利用网格重新划分技术,得到了复合材料液-固挤压变形过程中的应力场、应变场及变形力,并对有关问题进行了分析。与试验结果相比较,验证了该系统的可靠性,为保证制件成形质量和合理选择工艺参数提供了理论依据。The forming process of liquid-solid extrusion com-posite tubes is simulated by means of thermal rigid-plastic quasi-coupled FEM to reveal its plastic deformation behavior. According to the FEM simulation system software, the stress-strain field, the temperature field and the deformation pressure are obtained by the re-meshing technology, and the relative problems, including the stress-strain constitutive relation, simplified method for the liquid area in the deforming body, are analyzed. The com-parison of the numerical simulation results and the experiments validated the reliability of the system, which provided a theoretic basis for the assurance of the product forming quality and the rational choice of the technology parameters.

关 键 词：液-固挤压 Al2O3sf/LY12复合材料管材 成形过程 数值模拟 有限元法 

分 类 号：TG249.9[金属学及工艺—铸造] TB115[理学—数学]