铝材极板冲压成形晶体塑性有限元仿真分析  

Simulation analysis of plastic finite element of stamping and forming crystals of aluminum plates

作　　者：戴国南 熊君星[1] 刘建胜[1] DAI Guonan;XIONG Junxing;LIU Jiansheng(School of Advanced Manufacturing,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学先进制造学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2024年第2期227-232,238,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：江西省科技厅主要学科学术和技术带头人培养项目(20232BCJ22058)。

摘　　要：为研究双极板微成形过程中的尺寸效应问题,采用多通道结构,选用0.1 mm厚的1060纯铝片作为研究材料,通过Neper软件建立不同晶粒尺寸的多晶Voronoi模型,利用Python脚本为每个晶粒赋予随机取向,以模拟微冲压变形过程。通过晶体塑性有限元仿真成形研究晶粒尺寸对微冲压过程和质量的影响,包括极限成形深度、载荷-行程关系、尺寸精度以及成形厚度分布等方面。研究结果表明:随着晶粒尺寸的增加,板材极限成形深度在减小,最大变形载荷逐渐减小,厚度分布也更加不均匀,尤其是在拐角区域出现最薄的位置。In order to study the size effect on the microforming of bipolar plates,polycrystalline Voronoi models were established with different grain sizes by Neper software by using a multi-channel structure and selection of 0.1 mm thick 1060 pure aluminum sheet as the research material.Meanwhile,a random orientation was assigned to each grain by using Python script to simulate the microstamping deformation process.The effects of grain size on the microstamping process and quality,including the ultimate forming depth,load-stroke relationship,dimensional accuracy,and forming thickness distribution,were investigated by crystal plasticity finite element simulation molding.The results showed that the ultimate forming depth of the plate decreased with the increase of grain size,the maximum deformation load gradually decreased,and the thickness distribution was more uneven,especially in the corner region where the thinnest position occurs.

关 键 词：双极板成形 冲压 晶体塑性有限元 尺寸效应 

分 类 号：TG386[金属学及工艺—金属压力加工]