A probability characteristic of crack intersecting with embedded microcapsules in capsule-based self-healing materials

IF 1.9 4区材料科学 Q3 Materials Science

Science and Engineering of Composite Materials Pub Date : 2023-01-01 DOI:10.1515/secm-2022-0207

Z. Lv, Mengyan Shi, Jing Yuan, Depeng Chen, Minglei Guo, Tengfei Xiang, Huisu Chen

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Abstract

Abstract The micro-cracks in a material lead to a reduction in its overall strength and service life. The emerging capsule-based self-healing system provides a new strategy for repairing the cracks, effectively delaying the potential damage of the matrix, and prolonging the service life of composite materials. Determining the optimal size and dosage of microcapsules required to repair cracks in the matrix is essential for the development and design of capsule-based self-healing materials. This paper presents a novel two-dimensional capsule-based self-healing model composite material whose surface is paved by reproducible and random cells and some microcapsules are randomly dispersed in those cells to investigate the rupture behavior of microcapsules forced by growing cracks. An analytical model is proposed from the viewpoint of geometrical probability to express the probability characteristics of the embedded microcapsules stimulated by linear cracks in a two-dimensional capsule-based self-healing model composite. Additionally, the effect of the size and dosage of the embedded microcapsules on the intersection probability is analyzed, and the maximal probability is also found to improve the self-healing efficiency. Finally, the accuracies of these probability values and theoretical solutions are verified via computer simulation, and the results show that the developed model of the geometrical probability of the crack intersection with microcapsules randomly distributed in the cells of the matrix will help to provide a theoretical basis for the quantitative design of capsule-based self-healing materials.

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胶囊基自愈材料中裂纹与嵌入微胶囊相交的概率特征

摘要材料中的微裂纹会降低材料的整体强度和使用寿命。新兴的基于胶囊的自修复系统为修复裂纹提供了一种新的策略，有效延缓了基体的潜在损伤，延长了复合材料的使用寿命。确定修复基体裂缝所需微胶囊的最佳尺寸和用量是开发和设计基于微胶囊的自愈材料的关键。本文提出了一种新型的二维胶囊自愈模型复合材料，其表面由可再生和随机的细胞铺装，并在这些细胞中随机分散一些微胶囊，以研究微胶囊在裂纹增长的强迫下的破裂行为。从几何概率的角度提出了一种二维自愈模型复合材料中嵌入微胶囊受线性裂纹刺激的概率特性的解析模型。此外，还分析了微胶囊的尺寸和用量对交叉概率的影响，并找到了提高自愈效率的最大概率。最后，通过计算机仿真验证了这些概率值和理论解的准确性，结果表明，所建立的裂纹与随机分布在基体细胞中的微胶囊相交的几何概率模型将有助于为胶囊基自愈材料的定量设计提供理论依据。

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

Science and Engineering of Composite Materials 工程技术-材料科学：复合

CiteScore

3.10

自引率

5.30%

发文量

审稿时长

4 months

期刊介绍： Science and Engineering of Composite Materials is a quarterly publication which provides a forum for discussion of all aspects related to the structure and performance under simulated and actual service conditions of composites. The publication covers a variety of subjects, such as macro and micro and nano structure of materials, their mechanics and nanomechanics, the interphase, physical and chemical aging, fatigue, environmental interactions, and process modeling. The interdisciplinary character of the subject as well as the possible development and use of composites for novel and specific applications receives special attention.