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形状记忆合金(SMAs)由于其可塑的记忆效果,短期弹性、高阻抗容量和其他特性,因而具有感知和激励的功能。利用SMAs独一无二的特性,结合其他材料可用来制造出智能化或灵敏的合成材料。研究利用镍钛合金短纤维和颗粒制造的环氧合成材料的力学性能。由于加入了SMA,SMA/环氧合成材料具有更强的抗弯抗剪能力。特别在高温下,存储系数随着SMA显著增加。试验结果表明,SMA每增加3.5%,存储系数将有显著的增加,影响量级为环氧的6倍。当SMA相变接近120°时,存储系数增大到了最大值。SMA/ER3合成材料的损失因素随着SMA的增加而增加。基于Halpin-Tsai理论,具有SMA的薄层可以代表整个材料动力性能。相对于其他试验材料,在现有模型上得到的结论可以合理地预测这些动力响应。
Shape memory alloys (SMAs) have a perceived and motivating function due to their plastic memory effect, short-term flexibility, high impedance capacity and other properties. Utilizing the unique features of SMAs combined with other materials can be used to create intelligent or sensitive synthetic materials. The mechanical properties of epoxy composites made from NiTi staple fibers and particles were investigated. Due to the addition of SMA, SMA / epoxy composites have stronger bending and shear resistance. Especially at high temperatures, the storage coefficient increases significantly with SMA. The test results show that for every 3.5% increase in SMA, the storage coefficient will increase significantly, affecting 6 times the magnitude of epoxy. When the SMA phase change approaches 120 °, the storage coefficient increases to the maximum. The loss factor of SMA / ER3 composites increases with the increase of SMA. Based on Halpin-Tsai theory, a thin layer with SMA can represent the dynamic properties of the whole material. Compared with other test materials, the conclusions obtained from the existing models can reasonably predict these dynamic responses.