汽车覆盖件弹塑性失稳机理实验模拟研究  

Experimental research on mechanism of buckling in large panel

作　　者：刘守荣[1] 李大永[2] 中村雅勇[3] 

机构地区：[1]中国农业大学工学院,北京100083 [2]上海交通大学机械与动力工程学院,上海200030 [3]日本国立千叶大学

出　　处：《塑性工程学报》2007年第3期60-63,共4页Journal of Plasticity Engineering

基　　金：留学回国人员科研启动基金资助项目(2001498)

摘　　要：利用YBT模型,结合密栅云纹试验,模拟了汽车用钢板的拉伸过程。通过记录、测量、计算和分析,获得试样全部变形过程中的整场连续、瞬时位移、应变和应力信息。结果表明,汽车覆盖件回弹类缺陷是卸载不均匀压缩诱发的局部弹性失稳;起皱类缺陷是加载不均匀导致的塑性失稳。The Yoshida Buckling Test and moire topography experiment is used to simulate the stretching process in sheet metals. And information including continuous and instantaneous displacement, strain and stress during the whole deformation process are obtained through register, measure, calculation and analysis. It is found that the spring defect of large panels is a phenomenon of local elastic which is induced by unloaded nonuniformly, while the wrinkling is a phenomenon of plastic instability which is induced by nonuniform loading.

关 键 词：覆盖件 缺陷 失稳 

分 类 号：TG382[金属学及工艺—金属压力加工]