本文探讨了预应力钢材常温拉伸应力松弛试验中，初始试验力保持时间的意义与作用。
This paper describes the significance and role of the initial test load holding time in the tensile stress relaxation test at room temperature for the pre-stressed rolled steel.
并以常规的等速拉伸和应力松弛试验作对比。
Meantime, conventional constant-rate elongation tests and stress relaxation tests are conducted with DCS-500.
本文对常用的PP打包带进行拉伸试验，研究了不同温度处理后不同应力条件下PP打包带的应力松弛现象。
This paper deals with the PP strap tensile test, studied at different temperatures under different stress conditions after treatment with PP packing stress relaxation.
本文对常用的PP打包带进行拉伸试验，研究了不同温度处理后不同应力条件下PP打包带的应力松弛现象。
This paper deals with the PP strap tensile test, studied at different temperatures under different stress conditions after treatment with PP packing stress relaxation.
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