Abstract
This paper discusses the concepts involved in modelling creep-crack growth. Any cavitation that may be associated with crack propagation will, in general, have a fairly complex influence on the stresses and displacements occurring in the undamaged material. However, there are two limiting types of behaviour that result in significant simplifications to the analysis. If the interaction between the damaged and undamaged regions is negligible, then the crack velocity is dictated by the details of the cavitation. In the opposite limit, the crack velocity is dictated by the deformation of the bulk material. Furthermore, it is important to appreciate that there are a number of different ways to view the cavitation. For example, it can be considered to occur in a damage zone, a bridging zone or a shielding zone, but no matter which approach is adopted, the basic problem is unchanged and will yield the same predictions for the crack velocities. The method of analysis for any of these approaches is fairly well developed but, in all cases, the most important - and least understood - aspect is the mechanism of damage development.
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© 1989 Elsevier Science Publishers Ltd
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Thouless, M.D. (1989). Modelling Creep-Crack Growth Processes in Ceramic Materials. In: Cocks, A.C.F., Ponter, A.R.S. (eds) Mechanics of Creep Brittle Materials 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1117-8_5
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DOI: https://doi.org/10.1007/978-94-009-1117-8_5
Publisher Name: Springer, Dordrecht
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