厚织物复合材料层压板冲击损伤的数值预测

IF 6.3 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Niels van Hoorn , Sergio Turteltaub , Christos Kassapoglou , Wouter van den Brink
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引用次数: 0

摘要

本文介绍了在低速和高速冲击下评估厚织物碳纤维增强聚合物(CFRP)复合材料层压板损坏情况的模拟方法。该方法包括弹性和断裂材料属性的校准、验证和确认步骤,以及数值模拟模型参数的确定。采用离散断裂方法对损伤进行建模,并使用内聚界面元素捕捉层内和层间出现的单个裂缝。为提高计算效率,该方法在二维(2D)轴对称模型中实施。双悬臂梁、端部缺口挠曲和准静态压痕实验的结果与数值模拟结果非常吻合,可用于校准和验证离散断裂方法的实施。该方法可扩展到动态冲击分析,以预测破坏机制、力-位移历史,并通过测试结果进行验证。该方法将对破坏机理的深刻理解与可控的计算量相结合,与基准相比提高了 50 倍。失效图中总结的参数分析将损坏机制与冲击能量、质量和层压板厚度联系起来。所提出的方法在计算效率和准确性之间取得了平衡,使其成为冲击下厚 CFRP 复合材料层压板优化设计和认证的重要工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical prediction of impact damage in thick fabric composite laminates
A simulation methodology for assessing the damage in thick fabric Carbon Fibre Reinforced Polymer (CFRP) composite laminates under low- and high-velocity impacts is presented. It encompasses steps for calibration, verification, and validation of the elastic and fracture material properties as well as determination of model parameters for the numerical simulations. Damage is modelled using a discrete fracture approach with cohesive interface elements that capture individual cracks occurring in and between plies. For computational efficiency, the method is implemented in a two-dimensional (2D) axi-symmetric model. Results from double-cantilever beam, end-notched flexure, and quasi-static indentation experiments align well with numerical simulations and serve to calibrate and verify the implementation of the discrete fracture approach. The methodology is extended to dynamic impact analysis to predict damage mechanisms, force–displacement histories, and is validated using test results. This methodology combines meaningful insight in the failure mechanisms with a manageable computational effort, achieving a factor 50 improvement compared to a benchmark. A parametric analysis summarised in failure maps relates damage mechanisms to impact energy, mass, and laminate thickness. The proposed methodology strikes a balance between computational efficiency and accuracy, making it a valuable tool for optimum design and certification of thick CFRP composite laminates under impact.
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来源期刊
Composite Structures
Composite Structures 工程技术-材料科学:复合
CiteScore
12.00
自引率
12.70%
发文量
1246
审稿时长
78 days
期刊介绍: The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.
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