DIC Correlation with Analysis Under Impact of Fiber Metal Laminates

摘要

Impact analyses are performed on fiber metal laminates (FMLs) by free fall of a mass at low to medium velocities and time-out of plane displacement responses are compared with following Digital Image Correlation (DIC) test procedure involving random pattern image projection on the specimen and high-speed camera. CARALL 1 consists of five aluminium layers which are reinforced with twelve embedded quasi-isotropic carbon fibre laminates and CARALL 2 involves three layers of aluminium reinforced with two embedded carbon fibre laminates. The thin plate undergoes predominant elastic deformation and explicit dynamic analysis shows good agreement with experimental results than CARALL 1 that undergoes both elastic and plastic deformation. Both test and analyses show good agreement on the assessment of response time of the FML laminates. The behaviour of deflection under impact loading up to low velocity is found to be linear and beyond which, a non-linear behaviour is observed.