摘要
首先指出金属拉伸试验方法的关键问题是试验时的应力速度及应变速率控制。提出应用传感器及计算机技术，以一只比例节流阀为执行器构成旁路节流式微机控制电液系统，具有压力和速度双重控制功能，在液压式万能材料试验机上获得了良好的应力速率及应变速率控制的试验结果，为我国液压式材料试验机功能扩展和开发新一代机型奠定基础，以适应２１
In this paper the key problem is provided to control the stress rate and the strain rate during tensile testing for metallic material. Using transducer and computer technique only one throttle valve is firstly applied as an executor to construct by\|pass throttle type electric\|hydraulic system having capability of both pressure and speed control. A very good testing results of stress rate and strain rate have been obtained at traditional hydraulic testing machines to make it can control stress rate and strain rate to meet the need of strength testing for next century.
出处
《浙江工业大学学报》
CAS
1999年第3期214-221,共8页
Journal of Zhejiang University of Technology
基金
浙江省科委计划项目
关键词
金属拉伸试验
应力速率
应变速率
装备
metallic material tensile testing
stress rate
strain rate
by\|pass throttle valve
control pressure and speed
