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    唐世斌

    • 教授     博士生导师   硕士生导师
    • 性别:男
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:土木工程系
    • 学科:岩土工程. 计算力学. 桥梁与隧道工程. 水工结构工程
    • 电子邮箱:tang_shibin@dlut.edu.cn

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    Numerical model for the cracking behavior of heterogeneous brittle solids subjected to thermal shock

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    论文类型:期刊论文

    发表时间:2016-02-01

    发表刊物:INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

    收录刊物:SCIE、EI

    卷号:80

    页面范围:520-531

    ISSN号:0020-7683

    关键字:Thermal shock; Finite element method; Cracking pattern; Brittle solid

    摘要:A finite element based numerical model is developed to simulate the thermal cracking behavior of brittle solids subjected to thermal shock. The heterogeneity of the brittle solids at mesoscopic level is taken into account using the Weibull distribution. Furthermore, the cracking behavior of meso-element is modeled using continuum damage mechanics. The finite element method (FEM) is used to obtain thermal stress distribution, and then damage threshold is determined by the maximum tensile stress criterion. In the present work, the cracking behavior, including the initiation and propagation of microcracks, and the formation of approximately equally spaced surface cracks, are well captured by the numerical model. Furthermore, the impact of thermal conductivity on the cracking pattern of the heterogeneous brittle solids is also discussed in this study. The numerical simulation results are found to be consistent with the experimental observations in the literature, which indicates that the proposed numerical model is a potentially powerful tool to study the cracking behavior of the heterogeneous brittle solids subjected to thermal shock. (C) 2015 Elsevier Ltd. All rights reserved.