非标准试样高温拉-扭引伸仪的剪切应变信号换算  

THE SIGNAL CONVERSION OF SHEARING STRAIN OF NONSTANDARD SPECIMENS BY TENSION AND TORSION EXTENSOMETER UNDER HIGH TEMPERATURE

作　　者：王建国[1] 刘灵灵[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《理化检验（物理分册）》2005年第3期128-130,133,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：分析了MTS632.68c 01高温拉 扭引伸仪测量扭转应变信号的基本工作原理,据此推导出在非标定情况下使用该引伸仪时,其输出扭转应变信号的公式和简化计算式。实验验证表明,简化计算式的精度较高,最大相对误差为0.77%,可以满足测试精度的要求,从而大大扩充了该引伸仪的使用范围。The basic working theories of tension and torsion extensometer MTS632.68c-01under high temperature were analyzed, and the equations and simplified calculation equations of the output signal of torsion strain were derived by using extensometer under non-calibrated conditions. The test results show that the high precision of simplified calculation equations and the small relative errors (0.77%) can meet the requirements of testing precision. Therefore, the using range of the extensometer is expanded.

关 键 词：引伸仪 转角 剪切应变 简化计算式 

分 类 号：TG113.25[金属学及工艺—物理冶金]