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形状记忆纤维热粘弹性基体复合材料的力学行为

Keywords: 复合材料,力学行为,热粘弹性,niti纤维,基体,松弛模量

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Abstract:

?应用热粘弹性理论和voigt混合律,在变温场中针对马氏体逆相变过程建立了niti形状记忆纤维热粘弹性基体复合材料的应力--应变关系.在逆相变过程和基体呈现热粘弹态阶段,由于基体松弛其模量减小,在跃阶拉应力的作用下,复合材料的压缩应变迅速增大,纤维回复应力先增大后减小;在跃阶拉应变的作用下,复合材料的应力增加先变缓然后加快直至稳定.较高的温度和材料参数对niti纤维热粘弹性基体复合材料的力学行为和纤维的作动性能有明显的影响.

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