...循环软化; 循环蠕变; 应力控制 [gap=1028]Key words: polymer; fatigue; damage model; triaxiality stress constraint; cyclic softening; cyclic creep; stress control ...
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The details are presented as follows. At different stress amplitudes (i. e. , HCF regime, LCF regime and in-between regime), cyclic softening occurs in each case, and this phenomenon takes place more significantly with increasing stress amplitude.
在不同应力幅和不同度温度下其疲劳和损伤行为表现出明显不同的特点,具体表现如下：在不同应力幅下(即：高周疲劳区、低周疲劳区和介于高低周疲劳区之间)均发生了循环软化现象,而且随着应力幅的增加循环软化发生得更显著。
参考来源 - 应力幅和温度对超细晶铜的疲劳与损伤行为的影响The experimental results show that the PTFE is a rate-dependent material. Cyclic softening is found to exist under pure torsion loadings, and the PTFE has noticeable non-Masing behavior.
实验表明,PTFE是率相关材料,在剪切方向呈现循环软化,并且有明显的non-Masing特征。
参考来源 - 聚四氟乙烯室温下单轴和多轴循环变形实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The results show that the matrix in the microstructure occurs dynamic recovery and recrystallization and the materials generate cyclic softening during thermal cycling.
结果表明，在热循环过程中基体组织发生动态回复和再结晶，材料产生循环软化；
At lower annealing temperature obtain high strength and high yield ratio showed cyclic softening feature easily. That is detrimental to the using life of coiled tubing.
较低退火温度获得高强度、高屈强比易表现出循环软化特征，不利于提高连续油管的疲劳寿命。
Then, a logic computational diagram is constructed for calculating diametral growth by assuming fatigue cyclic softening, namely yield strength reduction as tubing fatigues.
再通过合理的假设，建立用于计算直径增长的计算机逻辑框图。
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