Fracture modeling of CNT/epoxy nanocomposites based on phase-field method using multiscale strategy

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-07-23 DOI:10.1177/14644207241262398

I Messaoudi, H Mallek, H Mellouli, M Wali, F Dammak

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引用次数: 0

Abstract

The computational modeling of fracture, particularly in structures with complex crack topologies, remains challenging due to significant computational costs, especially in simulating two- and three-dimensional brittle fracture. This study presents an efficient phase-field model to address these challenges. By leveraging the user (UMAT) subroutine in ABAQUS and establishing an analogy between the phase-field evolution law and the heat transfer equation, the method efficiently tackles complex fracture problems. The model is verified through analysis of typical 2D and 3D fracture benchmarks with different failure modes, demonstrating accuracy and efficiency compared to experimental and numerical data. Additionally, the model is applied to explore brittle fracture in carbon nanotubes (CNTs)/epoxy nanocomposites, revealing insights into the impact of CNT weight fraction on fracture phenomena prediction. The incorporated CNTs in the matrix are considered uniformly dispersed and randomly oriented. Overall, the developed model and computational implementation show promise for meeting the requirements of structural-level engineering practices.

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基于多尺度策略相场法的 CNT/epoxy 纳米复合材料断裂建模

由于计算成本高昂，尤其是在模拟二维和三维脆性断裂时，断裂计算模型，特别是具有复杂裂纹拓扑结构的结构断裂计算模型，仍然具有挑战性。本研究提出了一种高效的相场模型来应对这些挑战。通过利用 ABAQUS 中的用户（UMAT）子程序，并在相场演化规律和传热方程之间建立类比，该方法可有效解决复杂的断裂问题。该模型通过分析具有不同破坏模式的典型二维和三维断裂基准进行验证，与实验和数值数据相比，证明了其准确性和高效性。此外，该模型还被用于探索碳纳米管/环氧纳米复合材料的脆性断裂，揭示了碳纳米管重量分数对断裂现象预测的影响。基体中的 CNT 被认为是均匀分散和随机取向的。总之，所开发的模型和计算实现有望满足结构级工程实践的要求。

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

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 工程技术-材料科学：综合

CiteScore

4.70

自引率

8.30%

发文量

166

审稿时长

3 months

期刊介绍： The Journal of Materials: Design and Applications covers the usage and design of materials for application in an engineering context. The materials covered include metals, ceramics, and composites, as well as engineering polymers. "The Journal of Materials Design and Applications is dedicated to publishing papers of the highest quality, in a timely fashion, covering a variety of important areas in materials technology. The Journal''s publishers have a wealth of publishing expertise and ensure that authors are given exemplary service. Every attention is given to publishing the papers as quickly as possible. The Journal has an excellent international reputation, with a corresponding international Editorial Board from a large number of different materials areas and disciplines advising the Editor." Professor Bill Banks - University of Strathclyde, UK This journal is a member of the Committee on Publication Ethics (COPE).