softening stress-strain relation 变形关系 dynamic stress-strain relation-ship 动态应力应变关系 non-linear stress-strain relation 非线性应力 ..
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测试了五种纤维束的准静态和动态应力应变关系，并比较了它们对应变率的敏感性。
The dynamic tensile properties of five types of high strength fiber bundles were measured and the sensitivity of strain rates was investigated.
给出了灰砂岩、石灰岩两种岩石动态的破裂强度与应力应变关系。
The dynamic strength and dynamic stress-strain curves for sandstone and limestone are given.
研究结果表明：特别是在较高平均应变率下，应变率历史对试件材料的应力应变曲线有明显的影响，在材料动态本构关系研究中应当考虑应变率历史的影响。
The results show that the stress-strain curves are significantly affected by the strain rate history, and this effect must be accounted for in the study of material constitutive relations.
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