When the predeformation is 2%,BH and BHT value could reach an average of 80;when prestrain beyond 7%,the increase of BH value and BHT value tends to be slow.4.
当预变形为2%时,BH值和BHT值平均都达到80左右;当预应变超过7%后,BH值和BHT值的增加趋于平缓。
参考来源 - 热轧烘烤硬化钢板的开发The effects of dynamic loading and prestrain which are the main characteristics of earthquake loading on the mechanical properties and fracture behavior of welded joints of structural steel (Q235B and 16Mn steel) were investigated by tests.
首次全面系统地研究了地震载荷的两大重要特征:动载和预应变对典型建筑结构用钢Q235B 和16Mn 两种材料焊接接头的基本力学性能和断裂行为的影响。
参考来源 - 钢结构刚性梁柱节点抗震性能的研究For example, basically Q235 with pre-strain do not have the capacity to bear impact load, so it is not adapt to the work in plastic state.
Q235材料有预应变状态下基本不具备抗冲击能力,故不适于在塑性状态下工作。
参考来源 - 基于塑性强化效应的典型材料极限承载能力分析·2,447,543篇论文数据，部分数据来源于NoteExpress
当预应变超过0.95%时，反向屈服强度达到恒量。
When the pre-strain surpasses 0.95%, the reverse yield strength reaches to a constant.
裂纹形成的断裂为穿晶解理机制，预应变可导致更多的二次裂纹。
The fractography of the fatigue crack initiation displayed cleavage facet and more second cracks after pre-training.
结果表明，扭转预应变降低低周疲劳寿命，循环应力随扭转预应变的增大而增大。
The results show that low cycle fatigue life is reduced and cyclic stress is raised by torsional prestrain raising.
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