聚合物泡沫材料动态力学性能及其能量吸收研究

摘要

Foaming polyethylene(EPE) and foamed polypropylene (EPP) were tested in drop weight experiments to study the dynamic mechanical behavior of polymeric foams. With the proposal of a method to obtain stress-strain curve under certain strain rate, constitutive model of EPE was estab- lished in Low Density Foam. Comparison was made between real experiment and simulation results and the accuracy was validated. Based on the constitutive model, energy absorption and protective performance of polymeric foam was evaluated in refrigerator package drop experiments.%通过落锤实验，对发泡聚乙烯（EPE）、发泡聚丙烯（EPP）材料的动态力学性能进行了研究，提出了一种获得聚合物泡沫材料在恒定应变率下本构曲线的方法，建立了EPE的Low Density Foam本构模型。以此为基础，探索了在冰箱跌落过程中，聚合物泡沫包装材料的能量吸收以及对冰箱抗跌落冲击的保护能力。