拉伸应变

By the experiment and analysis, at the same shock pressure, the spall strength will increase with the strain rate, and it will decrease with the increasing thickness of samples.

通过实验与分析可知，在相同冲击压力下，层裂强度随拉伸应变率的增长而增长，随样品厚度的增加而减小。

Experiments were arranged by adjusting the thicknesses of flyer and sample to change the tensile strain rate,in order to investigate the effect of the tensile strain rate on the spall strength.

采用轻气炮加载技术和激光速度干涉测速技术相结合，对不同拉伸应变率条件下20钢的层裂特性进行了实验研究。

In this paper, a theoretical analysis on the effect of the form tolerance on tensile strain measnrement was made.

就形状公差对拉伸应变测定的影响做了理论分析。

A fatigue damage model with tensile strain level is obtained from the tests results in combination with energy theory.

由疲劳试验结果结合能量原理提出了一种考虑拉伸应变水平的疲劳损伤模型。

In this work, how the axial thermal conductivity of the three kinds of nanotubes is affected by axial length, temperature and tensile strain is investigated, and their thermal conductivities are compared and analized.

研究了轴向长度、温度和外加拉伸应变等因素对三种纳米管的轴向热导率的影响，并对三种纳米管的导热性能进行了比较。

Thus , the tuning can be performed to obtain a shorter or a longer wavelength according to apply a compressive or a tensile strain.

因此，可以进行微调，以获得更短或更长的波长根据适用压缩或拉伸应变

The relationships of thickness ratio with yield stress and tensile stress of the clad were established.

在传统的混合法则基础上，建立了宽度方向应力与相对厚度比和拉伸应变之间的关系。

The result makes clear: EThe tensile strength of TFE film increases somewhat along with the addition of drawing speed, and rupture outspread rate reduces;ETFE to succumb filmily somewhat along with the addition of drawing speed the addition that intensity follows drawing rate and increase somewhat, but the 2nd succumb intensity increases not big;ETFE to succumb filmily meet an emergency follows drawing rate increase somewhat, the 2nd succumb the amount of tangent and stretch model that meet an emergency reduces;ETFE film somewhat and model of the 2nd flexibility measure those who follow drawing rate to increase show downtrend, quantity of secant flexibility model and quantity of the 3rd stretch model do not have apparent change.

结果表明：ETFE薄膜的抗拉强度随拉伸速度的增加略有增加，而断裂延伸率随拉伸速度的增加略有减小；ETFE薄膜的屈服强度随拉伸速度的增加而有所增加，但第二屈服强度增加不大；ETFE薄膜的屈服应变随拉伸速度的增加略有增加，第二屈服应变则略有减少；ETFE薄膜的切线弹性模量以及第二弹性模量随拉伸速度的增加呈下降趋向，割线弹性模量和第三弹性模量则没有明显的变化。

The applicability of this constitutive model is evaluated with the simulations of material tests conducted by Sasaki et al., includes (1)Uniaxially constant strain amplitude cyclic test,(2)Fast in tension/Slow in compression constant strain amplitude cyclic test,(3)Slow-fast-slow constant strain amplitude cyclic test,(4)Cyclic strain with tensile hold time test. Simulations based on this constitutive model have a good agreement with (1),(2) and (3), proofs that it can describe the cyclic stress-strain behavior of 60Sn/40Pb solder very well.

为验证本模式之能力，本文选择Sasaki等人之实验为对象，分别对60Sn/40Pb焊锡在(1)定应变振幅之循环单轴负荷实验、(2)拉伸快/压缩慢之定应变振幅循环负荷实验、(3)慢-快-慢之定应变振幅循环负荷实验、(4)拉伸应力保持之循环应变实验下的材料行为进行模拟，由(1)、(2)及(3)之结果证明本模式对60Sn/40Pb焊锡循环应力-应变整体行为具有理想的描述能力，并对循环塑性应变范围与应力范围之值有准确的预估。

Using a gas gun,a set of plate impact experiments were performed for 20 steel by measuring the rear free-surface velocity profiles with a velocity interferometer system for any reflector.

采用轻气炮加载技术和激光速度干涉测速技术相结合，对不同拉伸应变率条件下20钢的层裂特性进行了实验研究。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。