LAUSR

Abstract Experimental and numerical studies are performed on perforation of carbon fiber-wound composite cylinders struck by hemispherical and conical-nosed impactors. Drop-hammer impact tests are conducted at the impact velocity of 4.5 m/s and the impact energy of 405 J. The damage morphologies and failure mechanisms of the cylinders are then analyzed. The change laws of the impact responses and the absorbed energies of the cylinders impacted by impactors with different nose-shapes are revealed. A finite element model considering both the progressive damage constitutive relation of the composite with various failure modes and the cohesive elements for the interfaces is proposed to simulate the impact events. The model predictions are found to be in good agreement with the test results. The influences of the cohesive elements on the impact behavior of the cylinder are analyzed. The present investigation is helpful for the safety assessments of the cylinders subjected to foreign object impacts.