Study of crack propagation in multi-phase composites embedded with both stiff and compliant particles using phase field method

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Sarnath Thoudham, P. Kumbhar, A. Kanjarla, R. Annabattula
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引用次数: 0

Abstract

Crack propagation in two-phase particle-reinforced composites is extensively studied using the phase field method. Typically, the particle either has a higher stiffness(stiff) or a lower stiffness(compliant) than the matrix. However, the crack propagation in multi-phase composites with both the stiff and compliant particles is not yet understood well. In this work, we report on the crack propagation characteristics and the resulting enhanced effective fracture toughness in multi-phase composite materials with both stiff and compliant particles using the phase filed method. Three different geometric arrangements of particles are considered: a diagonal array, a cubic array, and a honeycomb array. The honeycomb configuration had the best combination of strength and effective fracture toughness. We show that apart from the local geometric arrangement of the individual particles, the ratio of the stiffness of the individual particles is an important factor in crack propagation. Furthermore, we show that the ratio of the critical energy release rate of the individual particles can be tuned to increase the effective fracture toughness.
利用相场法研究嵌入刚性和顺应性颗粒的多相复合材料中的裂纹扩展情况
利用相场法对两相颗粒增强复合材料中的裂纹扩展进行了广泛研究。通常情况下,颗粒要么具有比基体更高的刚度(刚性),要么具有比基体更低的刚度(顺应性)。然而,人们对同时具有刚性和顺应性颗粒的多相复合材料的裂纹扩展还不甚了解。在这项研究中,我们采用相锉方法研究了同时含有刚性和顺应性颗粒的多相复合材料的裂纹扩展特性以及由此产生的增强有效断裂韧性。我们考虑了三种不同的颗粒几何排列:对角线阵列、立方体阵列和蜂窝阵列。蜂巢结构具有最佳的强度和有效断裂韧性组合。我们发现,除了单个颗粒的局部几何排列外,单个颗粒的刚度比也是影响裂纹扩展的重要因素。此外,我们还表明,可以调整各个颗粒的临界能量释放率之比来提高有效断裂韧性。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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