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Unilateral behaviour of microcracks and thermal conduction properties: a homogenization approach

Rangasamy Mahendren, Sharan Raj and Welemane, Hélène and Dalverny, Olivier and Tongne, Amèvi Unilateral behaviour of microcracks and thermal conduction properties: a homogenization approach. (2019) In: International Conference on Computational Contact Mechanics (ICCCM 2019), 3 July 2019 - 5 July 2019 (Hannover, Germany).

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Abstract

Damaging effects of microcracks on the elastic properties of brittle materials (rocks, concrete, ceramics) have been extensively studied through experiments and modelling approaches. In the latter case, the homogenization (up-scaling) technique appears as an effective tool to provide the overall properties from the microstructural features of the material. Especially for microcracks, main difficulties arise from: (i) the anisotropy induced by the oriented nature of defects, (ii) their ability to be open or closed according to tension or compression loading and to influence differently the overall response of the material. Such unilateral behaviour is typical of contact problems related to that kind of defects. Regarding the thermal properties of microcracked media, very few investigations on the effects have been done in the literature, even on the experimental point of view. Some micro-macro modelling works have been proposed to derive effective properties of a given Representative Volume Element (RVE) but consider only the open state of microcracks. This work aims to explore a homogenization-based approach to derive thermal properties accounting for unilateral effect. We also intend to perform numerical simulations through finite-element modelling in order to validate these theoretical results.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-02432424
Audience (conference):International conference without published proceedings
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Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
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Deposited On:08 Jan 2020 13:15

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