Crash analysis of glass mat thermoplastic (GF/PA6) tubes considering splaying failure mode and energy absorption

IF 5.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Impact Engineering Pub Date : 2024-07-04 DOI:10.1016/j.ijimpeng.2024.105044

Geunsu Joo, Young Cheol Kim, Hong-Kyu Jang, Jinbong Kim, Mungyu Jeong

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引用次数: 0

Abstract

Glass mat thermoplastic tubes are potential materials for improving crashworthiness owing to their excellent crash energy absorption capability due to their splaying failure mode of glass mat thermoplastic tubes, which must be considered in the crash analysis to accurately predict their crash performance. This study investigates the crash analysis of glass-mat thermoplastic composite tubes to realize the splaying failure mode and crash energy absorption capability. We evaluated the mechanical properties and fracture toughness of advanced glass mat thermoplastics, termed multi-layered hybrid mats, and employed the result in a 3D Hashin-type continuum damage model implemented with a user material subroutine. For the crash analysis of glass mat thermoplastic tubes, a three-dimensional finite element (FE) model, including cohesive elements in the middle layer of the tube to simulate the splaying failure mode, was constructed. In addition, in the process of the efficient FE modeling of the crash tube, the fracture toughness correction factor was proposed and optimized to calibrate the energy absorption in conjunction with crash test results, as interlaminar fracture modeling causes a difference in energy absorption between the actual test and simulation. As a result, the proposed crash analysis predicted the energy absorption capacity and a splaying failure mode of glass-mat thermoplastic tubes, demonstrating strong concordance with experimental results.

Abstract Image

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玻璃纤维毡热塑性塑料（GF/PA6）管的碰撞分析，考虑到了劈裂失效模式和能量吸收问题

玻璃毡热塑复合管具有优异的碰撞能量吸收能力，是提高耐撞性的潜在材料。本研究对玻璃毡热塑性复合管的碰撞分析进行了研究，以实现玻璃毡热塑性复合管的铺展破坏模式和碰撞能量吸收能力。我们评估了先进的玻璃毡热塑性塑料（称为多层混合毡）的机械性能和断裂韧性，并将评估结果应用于通过用户材料子程序实现的三维哈欣型连续损伤模型。针对玻璃毡热塑性管材的碰撞分析，构建了一个三维有限元（FE）模型，其中包括管材中间层的内聚元素，以模拟劈裂失效模式。此外，由于层间断裂模型会导致实际测试与模拟之间的能量吸收存在差异，因此在对碰撞管进行高效有限元建模的过程中，提出并优化了断裂韧性修正系数，以结合碰撞测试结果校准能量吸收。因此，所提出的碰撞分析预测了玻璃毡热塑管的能量吸收能力和劈裂失效模式，与实验结果非常吻合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Impact Engineering 工程技术-工程：机械

CiteScore

8.70

自引率

13.70%

发文量

241

审稿时长

52 days

期刊介绍： The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications