NUMERICAL INVESTIGATION OF ALUMINIUM PLATES SUBJECTED TO BLAST LOADING USING ARBITRARY LAGRANGIAN EULERIAN AND LAGRANGIAN APPROACHES

This paper deals with the non-linear dynamic behavior of thin Aluminium
plates subjected to blast loading. Aluminium plates with grade EN AW-1050A-H24
are studied. The square specimens have an area of interest of 300*300mm2 and
a thickness of 2.5mm. The blast loading is generated using free air blast (FAB)
and explosive driven shock tube (EDST). A numerical finite element model (FEM)
using the commercial software LS-DYNA is developed and validated based on the
experimental data from literature. A failure model is combined with the modified
Johnson-Cook constitutive relation to study the dynamic failure on the target. A
comparative study between the arbitrary Lagrangian Eulerian (ALE) and the
Lagrangian approach is assessed to guarantee the most adequate formulation for
the numerical model. The out of plane displacement from the ALE simulations
were found to be in good agreement with both the experimental values and the
corresponding results from the Lagrangian simulations. In this paper, an effort is
made to present a detailed numerical model for the prediction of the nonlinear
dynamic behavior of Aluminium plates subjected to blast loading.

ISBN:978-981-14-2689-6

Jaar van publicatie:2019

Trefwoorden:Aluminum plates, blast loading, lagrangian approaches

Toegankelijkheid:Open