Modelling Blast Response of Fibre Metal Laminates

摘要

This paper presents development of the finite element models to simulate the blast response of fibre metal laminates (FMLs), which are based on aluminium alloy and woven glass fibre reinforced polypropylene (GFRP). User subroutines VUMAT is developed to define the material constitutive behaviour and failure criteria of GFRP using the 3D Hahsin damage theory. In addition user-defined loading conditions are produced to describe the localised blast pressure impulses. These subroutines are implemented into ABAQUS/Explicit code to model the deformation and failure mechanisms of FMLs subjected to low impulses. The FE models developed cover FML panels with different stacking sequencies and layer geometries. The ultimate deformation/failure modes of FMLs studies are compared with the corresponding experimental ones with reasonably good correlation. Also good correlation is obtained between the experimental and numerical displacements. Using validated models, parametric studies may be further carried out to cover FMLs made with various stack sequences and layer thicknesses.