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Erschienen in:

2016 | OriginalPaper | Buchkapitel

9. Modeling Creep and Relaxation Caused by Phase Dissolution

verfasst von : X. Li, S. Rahman, Z. C. Grasley

Erschienen in: Challenges in Mechanics of Time Dependent Materials, Volume 2

Verlag: Springer International Publishing

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Abstract

Many materials are multiphasic, with an evolving, transient microstructure. If load-bearing phases within such a material dissolve while the material is under load, the stress being transmitted by those phases is handed off to neighboring phases, which leads to additional deformation. Thus, time-dependent dissolution results in creep or relaxation of the macroscopic material. To mechanistically model such dissolution-induced creep or relaxation, it is necessary to couple a model of the microstructure with the evolving states of stress and strain within the material. Here, we discuss a computationally-implemented model where creep or relaxation of an evolving composite is attributable to dissolution. Special care is taken in tracking the natural configuration of each voxel of the multiphasic material such that newly precipitated phases form in a stress-free state. The new model is utilized to model (1) relaxation of a porous material that has melting ice within its pore network and (2) relaxation due to hydration-induced dissolution within cement paste.

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Titel: Modeling Creep and Relaxation Caused by Phase Dissolution
verfasst von: X. Li
S. Rahman
Z. C. Grasley
Verlag: Springer International Publishing
Buch: Challenges in Mechanics of Time Dependent Materials, Volume 2
Print ISBN: 978-3-319-22442-8

Electronic ISBN: 978-3-319-22443-5

Copyright-Jahr: 2016
DOI: https://doi.org/10.1007/978-3-319-22443-5_9

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