利用MTS810试验机和自行研制的冲击拉伸试验装置对T300/Al复合丝实施了不同应变率下的拉伸试验,获得了材料从0.001 s-1到1 300 s-1应变率范围内完整的应力应变曲线.结果表明:T300/Al是一种应变率敏感复合材料,随着应变率的提高,材料的拉伸强度、失稳应变均相应提高,具有明显的应变率强化效应和动态韧性现象,这主要是由铝基体的应变率强化效应和应变率历史效应引起的.根据材料在不同应变率下的试验结果以及对其不同变形阶段机理的分析,提出了弹塑性复合丝束模型,并由此建立了相应的应变率相关的一维统计损伤本构方程,模型拟合结果与试验结果一致.
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