一种新的金属板料双向压缩剪切试验方法  

A Novel Test Method for Symmetrical Sheet Metal Compression-Shear

作　　者：徐芹所 庄新村[1] 方勇勇[1] 王涛[1] 赵震[1] 

机构地区：[1]上海交通大学塑性成形技术与装备研究院,上海200030

出　　处：《上海交通大学学报》2015年第10期1510-1515,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51105250)资助

摘　　要：针对现有板料剪切试验中剪切面数量及加载方式受限的不足,提出了一种新的金属板料双向压缩剪切试验方法,并结合数值模拟验证了其有效性.结果表明,所提出的双向压缩剪切试验方法能够使板料在变形区内处于纯剪切受力状态,且能够保持剪切变形过程中的受力状态.通过调整板料的几何结构,能够使板料在剪切变形区内处于稳定的负应力三轴度状态,以用于剪切断裂失效机理分析.Aimed at the features and disadvantages of currently published shear tests,a novel symmetrical compression-shear test on sheet metal was proposed.Besides,combined with numerical simulation,the proposed symmetrical compression-shear test was verified.The results show that the proposed test can realize and keep pure shear stress state in the deformation zones during the forming process.In addition,with the optimization of specimen structure,various negative and positive stress triaxiality states could be built in the shear deformation zones,which would be helpful for the study of fracture characteristics and flow behavior subsequently.

关 键 词：金属板料 压缩剪切试验 纯剪切 应力三轴度 

分 类 号：TG386.2[金属学及工艺—金属压力加工]