科研之友
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摘要
Different mechanisms (cooling, drying, and ageing) lead to the formation of crack patterns on the surface of some materials that are very difficult to describe in detail. We propose a model based on the coupled criterion using two necessary conditions for the nucleation of cracks: an energy condition and a stress condition. This model is applied to a simple example: a plate fixed to a rigid substrate and cooled down on its top face. During slow cooling, it highlights the ability of forming a first lattice of cracks and the subdivision thereof. It also shows that, in a rapid cooling (quenching), the higher the temperature drop, the tighter the cracks network.
- 出版日期2013-6
