Extreme loads on different scales : Viscoplasticity, instability and rupture
![Elasto-Visco-Plastic Buckling of Thick Shell [Jacquet et al. 2021]. a) Experimental setup : SAC305 thick shell submitted to external pressure. b) Pressure vs Time. Displacement field of the inner surface of the shell processed by 3 cameras images stereocorrelation. c) postmortem shape of the specimen. d) bifurcation analysis - critical pressure and buckling modes.](./images/axes_thematiques/1_94.png "Elasto-Visco-Plastic Buckling of Thick Shell [Jacquet et al. 2021]. a) Experimental setup : SAC305 thick shell submitted to external pressure. b) Pressure vs Time. Displacement field of the inner surface of the shell processed by 3 cameras images stereocorrelation. c) postmortem shape of the specimen. d) bifurcation analysis - critical pressure and buckling modes.")
The team is interested in fracture and instabilities in materials subjected to complex stresses, combining specific numerical methods such as phase-field models with multi-instrument experimental set-ups.
This makes it possible to predict the buckling of hulls subjected to high-gradient thermomechanical loading, or the cracking of viscoplastic materials.
These advanced models also predict multiplets and crack interactions. Often developed in the context of metals, they are finding applications in other fields, such as the rupture of biological tissues, in particular the healthy or repaired abdominal wall.
This makes it possible to predict the buckling of hulls subjected to high-gradient thermomechanical loading, or the cracking of viscoplastic materials.
These advanced models also predict multiplets and crack interactions. Often developed in the context of metals, they are finding applications in other fields, such as the rupture of biological tissues, in particular the healthy or repaired abdominal wall.