中文摘要：

采用有限元软件模拟金属粉末冲击压制过程时,由于计算量过大,所建立的模型颗粒数远低于实际粉末压制中的颗粒数,造成计算结果偏差过大,需要对冲模质量等相关参数进行优化。优化基于SHPB实验结果,通过ABAQUS对铝粉建立密排球堆积简化模型,有序增加模型横向与纵向颗粒数,确定仿真模型中冲模的质量,进而构建模拟中颗粒数与冲模相对质量之间关系,分别得到横向和纵向颗粒排数与冲模相对质量的关系;确立了粉末微观模拟压制中最常用的密排9堆积模型的冲模相对质量为0.093;通过与铜粉的冲击压实实验结果对比,验证所建立的模型颗粒数与冲模相对质量关系式在其他材料计算中也是适用的。

英文摘要：

For metal powder shock compaction,the particles number in the model created are far below the actual number due to the difficulty to simulate the pressing process via finite element software. As a consequent,the deviation of results would be so large that the quality of die and other relevant parameters need to be optimized. In order to complete the optimization,ABAQUS was used to establish a discrete density volleyball accumulation model for aluminum powder according to the SHPB experiment,and the number of particles in the lateral and longitudinal direction of the model was increased regularly to build the relationship between the number of particles in simulation and relative quality of die. The relationship between particle rows of transverse and portrait with the quality of the die were obtained through the simulation results. The relative quality of discrete density volleyball accumulation model is 0.093. The relationship built was applicable for other materials by comparing the experimental results of copper powder with the simulation results.