Prediction of low-velocity impact mechanical response and damage in thermoplastic composites considering elastoplastic behavior

IF 5.1 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Impact Engineering Pub Date : 2024-08-26 DOI:10.1016/j.ijimpeng.2024.105099
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Abstract

By incorporating the plastic deformation and Puck damage criteria law, a three-dimensional elastic-plastic-damage model has been established to predict the behavior of carbon fiber reinforced thermoplastic (CFRTP) composites under low-velocity impacts. The model has been integrated into ABAQUS/Explicit, and off-axis tensile test were conducted to ascertain appropriate parameters for the elastic-plastic model. Additionally, finite element modeling of off-axis tensile were employed to assess the precision of the model parameters and to contrast the variance of accounting for plastic deformation against neglecting it. The effectiveness of the elastic-plastic-damage model, incorporating damage considerations, was confirmed through an analysis of the mechanical response and progressive damage of CFRTP during low-velocity impact tests. Compared to the elastic-damage model that does not consider plastic deformation, the elastic-plastic-damage model, which takes plastic deformation into account, exhibits higher prediction accuracy. Both simulation and experimental results indicate that delamination and matrix cracking are the dominant damage patterns observed in CFRTP at relatively low impact energies (≤16.20 J).

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考虑弹塑性行为的热塑性复合材料低速冲击机械响应和损伤预测
通过结合塑性变形和帕克损伤准则定律,建立了一个三维弹塑性损伤模型,用于预测碳纤维增强热塑性塑料(CFRTP)复合材料在低速冲击下的行为。该模型已集成到 ABAQUS/Explicit 中,并进行了离轴拉伸试验,以确定弹塑性模型的适当参数。此外,还采用了离轴拉伸有限元模型来评估模型参数的精度,并对比考虑塑性变形与忽略塑性变形的差异。通过分析 CFRTP 在低速冲击试验中的机械响应和渐进损伤,证实了包含损伤因素的弹塑性损伤模型的有效性。与不考虑塑性变形的弹塑性损伤模型相比,考虑了塑性变形的弹塑性损伤模型具有更高的预测精度。模拟和实验结果都表明,在相对较低的冲击能量(≤16.20 J)下,分层和基体开裂是 CFRTP 中观察到的主要损伤模式。
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来源期刊
International Journal of Impact Engineering
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
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