试样尺寸对钢板塑性应变比r的影响  

Effect of Specimen Size on the Plastic Strain Ratio r of steel plate

作　　者：徐惟诚[1] 施强忠[1] 李和平[1] 苏大雄[2] 

机构地区：[1]上海宝钢工业检测公司品质检验中心,上海200941 [2]宝钢分公司制造管理部,上海200941

出　　处：《理化检验（物理分册）》2009年第2期94-96,107,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：选用三种尺寸的拉伸试样测试塑性应变比(r值)。通过试验和数据分析,得出当试验标距接近试样平行长度时,r值将下降。其原因是当标距接近试样平行长度时,试样标距内的应变是不均匀的。The plastic strain ratio （r value）was tested by the tensile samples of three kinds of size. The experiment results showed that the r value descended when the gauge length was near to the parallel length. Its reason was that the strain in the tensile sample gauge length was non-uniform at that time.

关 键 词：试样形状 r值 标距 应变水平 

分 类 号：TB302.3[一般工业技术—材料科学与工程]