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首页> 外文期刊>International Journal of Solids and Structures >A material model for cementitious composite materials with an exterior point Eshelby microcrack initiation criterion
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A material model for cementitious composite materials with an exterior point Eshelby microcrack initiation criterion

机译：具有外部点Eshelby微裂纹萌生准则的水泥基复合材料的材料模型

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摘要

A micromechanical model for cementitious composite materials is described in which microcrack initiation, in the interfacial transition zone between aggregate particles and cement matrix, is governed by an exterior-point Eshelby solution. The model assumes a two-phase elastic composite, derived from an Eshelby solution and the Mori-Tanaka homogenization method, to which circular microcracks are added. A multi-component rough crack contact model is employed to simulate normal and shear behaviour of rough microcrack surfaces. The development of the microcrack initiation criterion and the rules adopted for microcrack evolution are a particular focus of the paper. Finally, it is shown, on the basis of several numerical simulations, that the model captures key characteristics of the behaviour of cementitious composites such as concrete.
机译：描述了水泥基复合材料的微力学模型，其中在骨料颗粒和水泥基体之间的界面过渡区中，微裂纹的萌生由外点埃舍尔比溶液控制。该模型假定一个两相弹性复合材料，该复合材料是从Eshelby溶液和Mori-Tanaka均质化方法派生而来的，其中添加了圆形微裂纹。采用多组分粗糙裂纹接触模型来模拟粗糙微裂纹表面的法向和剪切行为。微裂纹萌生准则的发展和微裂纹演化所采用的规则是本文的重点。最后，在几个数值模拟的基础上，表明该模型捕获了水泥基复合材料（如混凝土）性能的关键特征。

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