论文部分内容阅读
通过一系列准静态压缩实验研究了纯泡沫铝、纯环氧树脂及三种不同体积分数的空心玻璃微珠(HGB)泡沫铝-环氧树脂互穿相复合材料(IPC)等五种材料压缩的变形过程和破坏形貌,分析了其破坏机制,并对三种IPC进行了应力松弛实验。通过绘制应力-应变曲线,分析了其变化规律,得出了有效弹性模量、屈服极限等力学性能及能量吸收特性。结果表明:三种IPC的有效弹性模量、屈服极限及比强度、比刚度均较纯泡沫铝有较大的提高,泡沫铝-环氧树脂的单位体积吸能率最大,且吸能率随空心玻璃微珠体积分数的增加而减小。泡沫铝-环氧树脂IPC有效弹性模量的预测结果与实验值较为符合。应力松弛率随空心玻璃微珠体积分数增加而增大。
A series of quasi-static compression experiments were carried out to study the compressive properties of pure aluminum foam, pure epoxy resin and three kinds of hollow glass microspheres (HGB) foam aluminum-epoxy interpenetrating composites (IPC) The deformation process and the failure morphology were analyzed. The failure mechanism was analyzed. Stress relaxation experiments were carried out on the three kinds of IPC. By drawing stress-strain curve, the change rule was analyzed, and the mechanical properties such as effective elastic modulus and yield limit and energy absorption characteristics were obtained. The results show that the effective modulus of elasticity, yield strength, specific strength and specific stiffness of the three kinds of IPC are much higher than that of the pure aluminum foam. Aluminum foam - epoxy resin has the largest unit energy absorption rate, Bead volume fraction increases with decreasing. The prediction results of the effective modulus of elasticity of aluminum foam - epoxy resin are in good agreement with the experimental values. The stress relaxation rate increases with the increase of hollow glass microbead volume fraction.