基于微观力学的多尺度框架,利用应变率效应模拟复合材料层压板受到的弹道冲击

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES
Christoforos Rekatsinas, Theodosios Theodosiou, Dimitrios Siorikis, Konstantinos Tsiaktanis, Nikolaos Chrysochoidis, Christos Nastos, Dimitris Saravanos
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引用次数: 0

摘要

复合材料和结构在达到或超过弹道极限的高速冲击下的性能对于评估其在航空航天应用中的强度和安全性至关重要。在这种高度瞬态的撞击状态下,复合材料会出现多种复杂的失效模式,其特性也容易受到应变率效应的影响,因此对其弹道撞击性能的模拟和理解极具挑战性。本研究提出了(1) 预测复合材料板弹道极限的多尺度计算框架,以及 (2) 碳/环氧板弹道冲击的实验结果。多尺度模型采用微机械方法来考虑应变速率依赖性,计算微应力对基体和纤维性能的影响,并预测它们对有效复合材料性能的耦合影响。使用最大应力准则确定层内损伤的发生和演变,但使用微观力学模型预测基体和纤维性能的退化。采用混合模式损伤法则来模拟分层,从而保证了结果的准确性和可靠性。提出的多尺度模型已经实现并集成到 ABAQUS/Explicit (VUMAT) 中。此外,还介绍了在高速冲击试验台上对 IM-65 碳/RTM6 环氧树脂编织复合材料板进行高速钢球冲击的实验结果,包括对损伤和失效类型的非破坏性评估。实验结果最终用于验证模型对弹道极限的预测以及对损坏和失效类型的预测。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Micromechanics-based multi-scale framework with strain-rate effects for the simulation of ballistic impact on composite laminates
The performance of composite materials and structures at high-velocity impacts reaching or exceeding their ballistic limit is crucial for assessing their strength and safety in aerospace applications. In this highly transient impact regime, composite materials are subject to multiple complex failure modes and their properties are susceptible to strain rate effects, making very challenging the simulation and understanding of their ballistic impact performance. This study presents: (1) a multi-scale computational framework for predicting the ballistic limit of composite plates, and (2) experimental results of ballistic impacts on carbon/epoxy plates. The multi-scale model uses a micromechanical approach to account for strain-rate dependency, to calculate micro-stress effects on the matrix and fiber properties, and to predict their coupled effect on effective composite properties. Intralaminar damage initiation and evolution are identified using the maximum stress criterion, but the degradation of properties in the matrix and fibers is predicted with the micromechanics model. Mixed-mode damage laws are implemented to simulate delamination, which guarantees accurate and reliable results. The proposed multi-scale model has been implemented and integrated into ABAQUS/Explicit (VUMAT). Experimental results from high-velocity steel ball impacts on woven IM-65 Carbon/RTM6 epoxy composite plates conducted on a high-speed impact test bench are also presented including non-destructive evaluation of the types of damage and failure. The experimental results are finally used to validate the model predictions for the ballistic limit and the predicted types of damage and failure.
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来源期刊
Journal of Composite Materials
Journal of Composite Materials 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.90%
发文量
274
审稿时长
6.8 months
期刊介绍: Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).
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