材料试验机自动控制中关键性问题的探讨  

Key Problem in Automatic Control of Material Testing Machine

作　　者：杨善军 

机构地区：[1]安阳钢铁公司中心试验室,河南安阳455004

出　　处：《物理测试》1995年第4期42-44,共3页Physics Examination and Testing

摘　　要：本文对GB228—87《金属拉伸试验方法》中有关试验速率控制方式的可行性进行了探讨。通过对自动控制拉伸试验过程的分析,找出了试验过程中速率切换不稳定性的影响原因。提出了“用弹性阶段平均应变速率代替应力极限转换点的瞬时应变速率”的观点,成功地解决了微机控制试验机速率切换控制中关键性问题。In this paper,the possibility was studied for testing speed control mode in 'GB228-87'. The reasons why the testing speed switched unconstantly ware found by analysing the process of automatic-controlled tensile testing. It is suggested the instantaneous strain rate at the limit point of stress must be replaced by the mean strain rate in elastic field. From this point of view, a bottle-neck problem in the speed switching of computer controlled testing machine was sovled successfully.

关 键 词：拉伸试验 金属材料 试验机 自动控制 

分 类 号：TH871.1[机械工程—仪器科学与技术]