Prévoir quand les matériaux cassent constitue un enjeu majeur dans de nombreux domaines industriels, géologiques et sociétaux. Cela reste une question largement ouverte : la concentration des contraintes par les fissures et défauts rend en effet la dynamique de rupture à l'échelle macroscopique très sensible au désordre de microstructure à des échelles très fines. Cela se traduit par des fluctuations statistiques importantes et des comportements sous homogénéisation non triviaux, difficiles à décrire dans le cadre des approches continues de l'ingénierie mécanique.
Nous examinons ici ces questions. Nous verrons :
Predicting when rupture occurs or cracks progress is a major challenge in numerous fields of industrial, societal, and geophysical importance. It remains largely unsolved: stress enhancement at cracks and defects, indeed, makes the macroscale dynamics extremely sensitive to the microscale material disorder. This results in giant statistical fluctuations and non-trivial behaviors upon upscaling, difficult to assess via the continuum approaches of engineering.
These issues are examined here. We will see:
@article{CRPHYS_2017__18_5-6_297_0, author = {Daniel Bonamy}, title = {Dynamics of cracks in disordered materials}, journal = {Comptes Rendus. Physique}, pages = {297--313}, publisher = {Elsevier}, volume = {18}, number = {5-6}, year = {2017}, doi = {10.1016/j.crhy.2017.09.012}, language = {en}, }
Daniel Bonamy. Dynamics of cracks in disordered materials. Comptes Rendus. Physique, Volume 18 (2017) no. 5-6, pp. 297-313. doi : 10.1016/j.crhy.2017.09.012. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2017.09.012/
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