Numerical simulation of low-velocity impact damage behaviour of composite laminates based on SMA superelasticity

This study established 3D finite element analysis models of composite laminates containing SMA wires of different angles and different distance intervals by combing ABAQUS software platform and VC++6.0 program designing.The SMA piecewise linear model derived from Brinson constitutive model to describe the SMA superelasticity and the 3D HASHIN failure criterion to predict intralaminar damage of composite laminates were compiled as ABAQUS/VUMAT subroutines.Interlaminar damage was modeled with cohesive element.Numerical simulation method of the low-velocity impact damage behaviour of composite laminates containing SMA wires and compression-after-impact was proposed.This study compared the damage behaviour of laminates with and without SMA wires,as well as ordinary metal wires at different impact energy.Compression-after-impact (CAI) simulation results indicate that the CAI strength of laminates containing SMA wires with volume friction of 25% and diameter of 0.5 mm,is increased by 5.78% compared with laminates not containing SMA wires,and by 4.69% compared with laminates containing ordinary metal wires at impact energy of 16 J.Furthermore,computation results of SMA wires volume friction and diameter value effecting on the impact behaviour show that laminates' anti-impact ability becomes stronger when volume friction increases.When volume friction keeps constant,the enhancing effect on the laminates' anti-impact ability with SMA wires of smaller diameter (0.3 mm) is better than that with larger diameter (0.6 mm).