The reason is that both temperature and stress combine to affect the accumulation of inelastic strain.

而在低温保温阶段，应力虽然较高，但温度较低，非弹性应变也不明显。

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The modulus of the material decreases and the inelastic strain increases with the increase of tension stress, and the composite exhibits a largely non-linear stress-strain behavior up to rupture.

随着应力的增加，材料模量减小，非弹性应变变大，复合材料的应力-应变行为表现为非线性直至断裂。

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The modulus of the material decreases and the inelastic strain increases with the increase of tension stress, and the composite exhibits a largely non-linear stress-strain behavior up to rupture.

随着应力的增加，材料模量减小，非弹性应变变大，复合材料的应力-应变行为表现为非线性直至断裂。

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