ANALYSIS OF DAMAGE IN COMPOSITE LAMINATES UNDER HIGH VELOCITY IMPACT BY PROJECTILES OF DIFERENT SHAPES
According to the macrostructure and microstructure of the composite laminates,a rate-dependent constitutive model was developed based on the assumption that the fibre is linear-elastic and the matrix is visco-elastic.On this foundation,a 3D-Hashin failure criteria was selected to identify the in-plane damage of composite laminates by replacing quasi-static strength properties with rate-dependent strength properties,and the cohesive element was involved to simulate the delamination of the composite laminates under a high velocity impact.By using a nonlinear finite element method,a numerical analytical model was presented to predict damage in composite laminates under a high velocity impact.By adopting this model,the ballistic performance and damage characteristics of composites laminates impacted by projectiles with different shapes were studied deeply.Some valuable conclusions were obtained.