LEGUILLON, Dominique; LI, Jia; MARTIN, Eric

doi:10.1016/j.euromechsol.2016.12.003

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LEGUILLON, Dominique

LI, Jia

MARTIN, Eric
Laboratoire des Composites Thermostructuraux [LCTS]

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European Journal of Mechanics A/ Solids. 2017, vol. 63, p. 14-21

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Multi-cracking of brittle thin layers and coating is a phenomenon difficult to model especially because ofthe large number of cracks that may occur. It is overcome herein by conducting calculations, not on thewhole structure, but only on a simplified cell that is representative of the structure by periodic dupli-cation. The coupled criterion is applied within this representative cell (RC) and allows to predict the crackdensity under an increasing applied load, the length of the RC being a variable parameter of the model.Based on the simultaneous fulfilment of an energy and a stress conditions, it allows to take into accountthin layers where the crack onset is energy driven and thicker layers where the stress condition governsthe transverse cracking. Results are in a good agreement with various experiments found in the litera-ture, conducted on cross-ply laminates and coated substrates< Réduire

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Multi-cracking in brittle thin layers and coatings using an FFM model

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