Abstract

This article deals with initial material selection and design method of long fibre-reinforced thermoplastic (LFT) based on impact resistance requirements. In this study, effects of material properties and impact condition, including total fibre thickness, fibre aspect ratio and impactor diameter, on the minimum penetration energy of LFT plates are analysed based on experiments and validated numerical models. Mathematical expression is established between them. Applicability of the original model for LFT plate with different fibre aspect ratios subjected to different impactors is discussed. The minimum penetration energy is used as the bridge between energy absorption characteristics and material parameters, impact condition. Finally, an updated theoretical model for energy absorption analysis is proposed. We conclude that the updated semi-empirical model is a valuable tool for a first stage material selection and design.

摘要

本文介绍了基于抗冲击要求的长纤维增强热塑性塑料 (LFT) 的初始材料选择和设计方法。在这项研究中，基于实验和验证的数值模型，分析了材料性能和冲击条件，包括总纤维厚度、纤维纵横比和冲击器直径对 LFT 板最小穿透能量的影响。它们之间建立了数学表达式。讨论了原始模型对不同纤维长径比的LFT板在不同冲击器下的适用性。最小穿透能量作为能量吸收特性和材料参数、冲击条件之间的桥梁。最后，提出了能量吸收分析的更新理论模型。