Evaluations on VCCT and CZM methods of delamination propagation simulation for composite specimens

Q3 Earth and Planetary Sciences Aerospace Systems Pub Date : 2023-06-20 DOI:10.1007/s42401-023-00231-8
Rui Liu, Zhefeng Yu, Fedor Nasonov
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引用次数: 1

Abstract

Fiber-reinforced composite laminates are widely used in aerospace and other fields. Delamination damage is the main damage form of laminates, which has always been one of the focus problems of composite mechanics. Virtual crack closure technique (VCCT) and cohesive zone modeling (CZM) are two well-known numerical methods frequently used for crack propagation modeling. In this study, to better understand the advantages and limitations of these two methods, as well as the process of practical application, the evaluations on them are conducted. A double cantilever beam (DCB) specimen, an end notched flexure (ENF) specimen, and a mixed-mode bending (MMB) specimen as benchmark examples are modeled in ABAQUS. The mode I, mode II, and mixed-mode (I + II) delamination initiation and propagation behaviors of unidirectional specimens are simulated using two above methods. Finite element (FE) results are compared with experimental results available in the literature to verify the validity of the FE models. Finally, the accuracy, convergence speed, run-time, mesh dependency, and influence of modeling parameters of each method are discussed based on the simulation of DCB test.

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复合材料试样分层扩展模拟的VCCT和CZM方法评价
纤维增强复合材料层压板广泛应用于航空航天等领域。分层损伤是复合材料的主要损伤形式,一直是复合材料力学研究的热点问题之一。虚拟裂纹闭合技术(VCCT)和内聚区模拟(CZM)是两种常用的裂纹扩展数值模拟方法。在本研究中,为了更好地了解这两种方法的优点和局限性,以及实际应用的过程,对它们进行了评价。以双悬臂梁(DCB)试件、端缺口弯曲(ENF)试件和混模弯曲(MMB)试件为基准,在ABAQUS中进行了建模。采用上述两种方法模拟了单向试样的I型、II型和混合(I + II)型分层的起裂和扩展行为。将有限元计算结果与文献中已有的实验结果进行比较,验证了有限元模型的有效性。最后,在DCB试验仿真的基础上,讨论了每种方法的精度、收敛速度、运行时间、网格依赖性以及建模参数的影响。
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来源期刊
Aerospace Systems
Aerospace Systems Social Sciences-Social Sciences (miscellaneous)
CiteScore
1.80
自引率
0.00%
发文量
53
期刊介绍: Aerospace Systems provides an international, peer-reviewed forum which focuses on system-level research and development regarding aeronautics and astronautics. The journal emphasizes the unique role and increasing importance of informatics on aerospace. It fills a gap in current publishing coverage from outer space vehicles to atmospheric vehicles by highlighting interdisciplinary science, technology and engineering. Potential topics include, but are not limited to: Trans-space vehicle systems design and integration Air vehicle systems Space vehicle systems Near-space vehicle systems Aerospace robotics and unmanned system Communication, navigation and surveillance Aerodynamics and aircraft design Dynamics and control Aerospace propulsion Avionics system Opto-electronic system Air traffic management Earth observation Deep space exploration Bionic micro-aircraft/spacecraft Intelligent sensing and Information fusion
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