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Abstract：
Quasi-static and dynamic tensile tests on aluminum-hydroxide-enhanced ethylene propylene diene monomer (EPDM) coatings were conducted using a universal testing machine and a Split Hopkinson Tension Bar (SHTB) over a strain rate range of 10-3 to 103 s-1. This comprehensive study explored the tensile performance of enhanced EPDM coatings in solid rocket motors. The results demonstrated a significant impact of strain rate on the mechanical properties of EPDM coatings. To capture the hyperelastic and viscoelastic characteristics of EPDM coatings at large strains, the Ogden hyperelastic model was used to replace the standard elastic component to develop an enhanced Zhu-Wang-Tang (ZWT) nonlinear viscoelastic constitutive model. The model parameters were fitted using a particle swarm optimization (PSO) algorithm. The improved constitutive model\'s predictions closely matched the experimental data, accurately capturing stress-strain responses and inflection points. It effectively predicts the tensile behavior of aluminum-hydroxide-enhanced EPDM coatings within a 20% strain range and a wide strain rate range.
摘要：
使用万能试验机和分体式霍普金森张力棒（SHTB）在10-3至103s-1的应变速率范围内对氢氧化铝增强的乙烯丙烯二烯单体（EPDM）涂层进行了准静态和动态拉伸试验。这项综合研究探索了固体火箭发动机增强三元乙丙橡胶涂层的拉伸性能。结果表明，应变速率对EPDM涂层的力学性能有显著影响。为了捕获EPDM涂层在大应变下的超弹性和粘弹性特性，使用Ogden超弹性模型代替标准弹性构件，以建立增强的Zhu-Wang-Tang（ZWT）非线性粘弹性本构模型。使用粒子群优化（PSO）算法拟合模型参数。改进的本构模型的预测与实验数据非常吻合,准确捕获应力应变响应和拐点。它有效地预测了氢氧化铝增强的EPDM涂层在20％应变范围和宽应变率范围内的拉伸行为。
