拉伸试验的速率探讨  

Discussion on Rate of Tensile Test

作　　者：陈华锋[1] 王滨[1] 黄旭东[1] 

机构地区：[1]上海材料研究所,上海200437

出　　处：《理化检验（物理分册）》2009年第5期285-287,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用夹头分离速率控制方式对：行屈服现象和无屈服现象的试样进行拉伸试验，探讨了试验过程中试样应变速率和应力速率的变化情况。试验结果表明：在不同的变形阶段试样的应变速率是不同的，弹性阶段的应变速率比设定值低很多，屈服阶段会略高，塑性变形阶段与设定值较接近。并确定在该试验条件下可将试验速率设定在1～7mm／min。The change of strain rate and slress rate of samples with and without yielding phenomenon was studied during the tensile test under the control of grip separate rate. It is showed that strain rate was different in the different deformation stage, the value of strain rate was much lower than the set value in elastic stage, little higher in yield, and close to the set value in the plastic deformation. And the test rate was enacted in 1-7 mm/min under the testing condition.

关 键 词：夹头分离速率 应变速率 刚度 拉伸试验 

分 类 号：TG115.52[金属学及工艺—物理冶金]