MODELLING LOW VELOCITY IMPACT IN C/EPOXY LAMINATES

摘要

The development of accurate damage models to predict the energy absorption in C/epoxy laminates is an area of increasing interest in composite engineering. Virtual tests of low velocity impact were performed using the finite element explicit code ABAQUS including the experimental damage mechanisms experimentally observed. A constitutive 3D continuum damage mechanics model was implemented in the code as a VUMAT user material subroutine and standard cohesive elements were inserted at the interface between composite plies to simulate delamination damage. Force versus time histories and absorbed energy were compared with experimental results on C/epoxy laminates and showed good agreement.