MODELLING THE BEHAVIOUR OF WOOD DURING THE CRASH OF A CASK IMPACT LIMITER

We present experimental results and their analytical modelling for wood under static and dynamic compression which involves large deformations. We also present a numerical constitutive relation for the compression of wood under large deformations. This \"wood model\" is based on the experimental results mentioned before. It is used in a finite element explicit non-linear dynamic code. By this way, we can compare this model with other models used to characterize wood when it's used in cask impact limiters. Finally, we compare test results of a container model using wood as impact limiter crashed at 52 m/s with numerical results made with two numerical material types used to model the behaviour of wood under compression with large deformations (elastoplastic model and wood model).