| 1. | A mean strain or prestrain, as in fig. 83, can under certain conditions reduce the subsequent fatigue life .
一个如图83所示的平均应变或预应变，在某种情况下，能够缩短以后的疲劳寿命。 |
| 2. | Experimental study of impact location method for piezoelectric smart structure
时效处理温度对预应变碳素钢疲劳极限的影响 |
| 3. | And to the specimens with various pre - deformation , the larger strain is , the higher temperature at which recovery stress start and the maximal stress arrive is , and the lower recovery stress is
不同预应变下，预应变越大，开始出现回复力及达到最大回复力的温度越高，而最大回复力却越小。 |
| 4. | The lath width of martensite can be fined noticeably by pre - strained quenching at non - dynamic recrystallization to approach nanometer magnitude ( the average width is 120nm )
采用非动态再结晶温度下的预应变-淬火，提高马氏体相变形核率，可以超细化马氏体的板条晶片宽度，使之接近纳米量级水平(平均宽度达到120nm ) 。 |
| 5. | The a3 steel is a kind of plastic material which we commonly used in our daily life and teaching , but there is not much study of mechanical behaviour of the material after pretorsion and pretension intensify at present
A3钢是我们日常生活和教学中常用的一种塑性材料，但对于这种材料在扭转预应变和拉伸预应变后的力学性能目前研究的不多。 |
| 6. | 5 ) as the deformation strain increases the reverse transformation temperature and thermal hystersis of tini film increase on the first heating , while the martensitic transformation temperature decreases and r phase transition temperature is constant
随预应变量增大， tint薄膜的第一次逆相变温度升高，相变热滞增大，马氏体相变温度降低， r相变温度无明显变化。 |
| 7. | Based on the test , a new type of sma damper is designed and its theoretical model is set up . then , a detailed experimental investigation is carried out in order to get a full understanding of working performance of the damper , from which the effects of strain level , temperature , as well as frequency and pre - strain of sma wires are taken into account . the theoretical model is verified by the experiments
在此基础上，本文设计了一种新型形状记忆合金被动耗能阻尼器，建立了阻尼器的理论模型，通过试验研究了阻尼器的工作性能，分析了位移幅值，加载频率，工作温度和记忆合金丝预应变对阻尼器的等效刚度，单位循环的耗能和等效阻尼比的影响，并与理论分析结果进行了对比，验证了理论模型的正确性。 |
| 8. | Abstract : in this paper , the effect of pre - stress on peen - forming is studied by experiments , the results show that pre - stress can change the relationship between pre - deformation and pre - stress shot peen deformation , and that 0 . 05 % 0 . 1 % pre - strain is comparetively suitable to improve the spanwise rectilinearity of shot peen - forming configuration surface
文摘:对预应力喷丸成形进行了试验研究，指出预应力可以改变其对应的预变形与预应力喷丸变形之间的大小关系，在以改善喷丸型面纵向直线度为主要目的的预应力喷丸成形中，预应变取值0 . 5 / 1000 1 / 1000较为适宜。 |
| 9. | Comparing with these several strengthen formal , towards strength limit ' s improvement , the effect of torsion - tension and tension - torsion - tension was close ; simply tension - torsion - tension required a little larger prestrain quantity . whereas , towards yield limit " s improvement , the effect of torsion - tension - tension action ' s strengthen was the best
从几种硬化形式的比较来看，对于强度极限的提高，扭转-拉伸和拉伸-扭转-拉伸的强化效果相近，只是拉伸-扭转-拉伸所需的预应变量要大一些；而对于屈服极限的提高，扭转-拉伸-拉伸作用下的强化效果最佳。 |
| 10. | The result showed that plastic deformation during pre - strain played an restrained role on the growth of martensite ( especially in the direction of lath width ) and increase the nucleation rate indirectly ; the elastic energy induced by plastic deformation restrain the transformation of primary martensite but accelerate the transformation of after martensite
实验结果表明：预应变过程中造成的塑性变形对马氏体生长(尤其是宽度方向)有约束作用，起间接提高马氏体形核率的作用，所储备的弹性应变能对初生马氏体的转变有抑制作用，但对继生马氏体的转变却有促进作用。 |
