粉末压制过程数值模拟的研究现状及展望

数值模拟技术成为粉末压制过程研究和应用的有效手段。综述了粉末压制过程数值模拟的力学建模方法及典型屈服模型、材料参数(杨氏模量、泊松比、流动应力)模型等,并对该领域涉及的常用软件,如MSC.Marc、ABAQUS、DEFORM和ANSYS等,进行了详细比较。基于这些研究现状,对数值模拟在粉末冶金领域的发展趋势做出了展望,指出建立更精确的适用于粉体的数学模型,加强三维模拟和多场耦合技术,软件二次开发,提高数值模拟的精确性、实用性是未来的主要发展方向。

Current progress and prospect of numerical simulation in powder compaction

Numerical simulation has become an effective tool in research and application of the powder compac-tion process. The mechanical modeling methods,the typical yield models and the material parameters(e.g.Young's modulus,Poisson's ratio and flow stress)used in the finite element simulation of powder compaction process were summarized. In addition,several softwares commonly used in this field,such as MSC.Marc,ABAQUS, DEFORM and ANSYS were compared in detail. Based on the current research situation,the future of simulation technique in powder metallurgy field was expected,and the primary development directions was pointed out, which were establishing more accurate mathematical models,enhancing 3D simulation and multi-fields coupling ability,applying software secondary development technology and improving numerical precision and practicality.