Combining a CDM model and a FE-Particle method to analyse the ruin modes of a composite structure during a crash

Christine Espinosa (1) , J. Limido , Frederic Lachaud (1) , J.-L. Lacome

1 ICA - Institut Clément Ader

A continuum damage model inspired from the Matzenmiller-Lubliner-Taylor’s model, has been derived to predict damage induced in T800S/M21GC sample plates during low velocity impacts. It was found that for crashworthiness applications, it is necessary to couple the progressive ruin of the material to a representation of the matter openings. Element kill technique (erosion) is efficient but not predictive. A technique switching finite elements into particles at rupture is used to create cracks and accumulated mater during the crash of the structure. Switching criteria are defined using the contribution of the different ruin modes in the damage evolution.

Domaines: Matériaux et structures en mécanique [physics.class-ph]

Christine Espinosa, J. Limido, Frederic Lachaud, J.-L. Lacome. Combining a CDM model and a FE-Particle method to analyse the ruin modes of a composite structure during a crash. European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012), 2012, Vienna, Austria. ⟨hal-02186316⟩