Repulsion and attraction in a couple of cracks
| Autor: | Marie-Julie, Dalbe, Juha Koivisto, Loïc Vanel, Amandine Miksic, Osvanny Ramos, Mikko Alava, Stéphane Santucci |
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| Přispěvatelé: | Service irevues, irevues, Association Française de Mécanique |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | CFM 2015-22ème Congrès Français de Mécanique CFM 2015-22ème Congrès Français de Mécanique, Aug 2015, Lyon, France HAL |
| Popis: | Colloque avec actes et comité de lecture. Internationale.; International audience; We have performed an experimental study of the interaction of two collinear cracks in different polymer sheets submitted to uniaxial stress at a constant imposed velocity. Depending on the samples geometry and the material used, we could observe that the two cracks interact in different ways. More specifically, we could observe different crack trajectories, with in particular, a repulsive regime, which evolves systematically with the initial vertical crack separation d. We show that the angle characterizing the amplitude of the repulsion - and specifically its evolution with d - depends strongly on the microscopic behavior of the material. We provide a physical interpretation of our results, based on the observation of different shape and size of the fracture process zone in the different samples studied. At interaction distances larger than the process zone size, the microscopic shape of the process zone tip controls the amplitude of the crack repulsion, contrary to the macroscopic mechanical behavior of the material. |
| Databáze: | OpenAIRE |
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