As there are gradually increasing interests in polymeric energy-absorbing materials to reduce unwanted noise/vibration, and enhance impact resistance in structural applications, considerable efforts have been empirically made to improve energy-absorbing properties. However, there has been no detail understanding of the energy-absorbing mechanisms of particulate composites, thereby showing a trade-off between toughness and modulus/strength. Therefore, by coupling modeling and experimental efforts, this study systematically explores the thermoplastic polymer particle toughening and ways to overcome the typical compromise in energy-absorbing composites. Polyamide-nylon 6 particulate polycarbonate composite was carefully designed for achieving extraordinary energy absorption with the uncompromised properties. The debonding, fracture toughness and yieldings were semi-empirically investigated to reveal fracture energy contributions. It was found that the mainly responsible energy-absorbing mechanism was matrix yielding (48.28%), which results from the particle debonding and significantly contribute to crack propagations. This study could provide new solutions for the energy-absorbing composites without any comprome in modulus/strength.

随着人们对聚合物能量吸收材料的兴趣逐渐增加，以减少不需要的噪音/振动，并提高结构应用中的抗冲击性，已经在经验上做出了相当大的努力来改善能量吸收性能。然而，目前还没有对颗粒复合材料的能量吸收机制的详细了解，从而显示出韧性和模量/强度之间的权衡。因此，通过耦合建模和实验工作，本研究系统地探索了热塑性聚合物颗粒的增韧以及克服能量吸收复合材料中典型折衷的方法。聚酰胺-尼龙 6 颗粒聚碳酸酯复合材料经过精心设计，可实现非凡的能量吸收和不折不扣的性能。脱胶，对断裂韧性和屈服进行了半经验研究，以揭示断裂能量的贡献。结果发现，主要负责的能量吸收机制是基体屈服（48.28％），这是由颗粒脱粘引起的，并且对裂纹扩展有显着贡献。这项研究可以为吸能复合材料提供新的解决方案，而不会影响模量/强度。