An anisotropic thermomechanical damage model for concrete at transient elevated temperatures

Baker, Graham and deBorst, Rene (2005) An anisotropic thermomechanical damage model for concrete at transient elevated temperatures. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 363 (1836). pp. 2603-2628. ISSN 1471-2962

Abstract

The behaviour of concrete at elevated temperatures is important for an assessment of integrity (strength and durability) of structures exposed to a high-temperature environment, in applications such as fire exposure, smelting plants and nuclear installations. In modelling terms, a coupled thermomechanical analysis represents a generalization of the computational mechanics of fracture and damage. Here, we develop a fully coupled anisotropic thermomechanical damage model for concrete under high stress and transient temperature, with emphasis on the adherence of the model to the laws of thermodynamics. Specific analytical results are given, deduced from thermodynamics, of a novel interpretation on specific heat, evolution of entropy and the identification of the complete anisotropic, thermomechanical damage surface. The model is also shown to be stable in a computational sense, and to satisfy the laws of thermodynamics.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Awaiting Author's version.
Depositing User: Prof Graham Baker
Faculty / Department / School: Current - USQ Other
Date Deposited: 29 Oct 2007 07:18
Last Modified: 02 Jul 2013 22:52
Uncontrolled Keywords: thermodynamics; anisotropic damage; concrete; elevated temperatures; coupled problems
Fields of Research (FOR2008): 02 Physical Sciences > 0203 Classical Physics > 020304 Thermodynamics and Statistical Physics
Identification Number or DOI: doi: 10.1098/rsta.2005.1589
URI: http://eprints.usq.edu.au/id/eprint/3451

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