Similar behaviors were also found when monotonic loading was restarted at a constant stain rate following a creep loading or stress relaxation stage. 类似现象同样也发生在蠕变加载或应力松弛后以一恒定应变率突然重新加载的情况。
The experimental items of the tests are tension of constant strain rate, creep at constant stress, and strain controlled low cycle fatigue of constant strain rate. 实验项目有等应变率拉伸、等应力蠕变和控制应变幅的等应变率塑性循环。
By a newly developed test method, the constant strain rate ( CSR) test method, the creep behaviour of X20CrMoV12 · 1 pipe girth welds was studied with particular emphasis on the effect of welding conditions and type of filler metal. 用新开发的恒应变速率试验方法研究了X20CrMoV12·1管接头蠕变行为,重点考虑了不同焊接条件和焊缝填充金属种类的影响。
The constant creep rate and creep breaking elongation were increased and creep-resistance breaking time was decreased with the increase of room temperature. 随环境温度的升高,纤维的恒蠕变速率增大,抗蠕变断裂时间变小,蠕变断裂伸长变大;
The results show that at the same temperature and the constant pressure, the creep resistance of the rubber increase with hardness increasing as well as stress relax rate decreasing. And the Carbon black can improve the creep properties of the rubber. 结果表明:在相同的温度和恒定的压力下,碳纤维的含量越高、橡胶的硬度越大,应力松弛速率越小,橡胶的抗蠕变能力越强:碳黑能改善橡胶的蠕变性能。
Take full account of the preparation of standard test sample, set of device parameters, temperature and other details on the polyethylene pipe specimen, constant strain rate tensile, creep test and relaxation test are accomplish. 充分考虑标准试验试样制备、设备参数设置、温度调节等细节,对聚乙烯管试样进行等速率拉伸、蠕变、松弛试验,通过合理的试验处理得到真实应力应变曲线以及力学性能参数。