Evaluation of observed energy from adiabatic impact on composite lamenates

Abstract EN

In this paper, the energy observed due to impact of conical projectiles on composite laminates is investigated.

Four types of energies observed were studied.

They are strain energy due to deformation of plate, large deformation near the impact zone, delaminating energy and energy losses due to friction.

The equation of motion of plate was developed for orthotropic laminated plate and solved with its boundary conditions.

Large deformation of delaminated zone was derived assuming deformation shape formulation to calculate the penetration depth and delaminating radius.

Delaminating energy was calculated by solving the delaminating failure criteria with equation of motion.

Friction energy was calculated assuming constant friction coefficient.

The results show that the energy of deformation of plate is smaller than that for the large deformation and delaminating energy.

And as cone angle increases the energy observed will be increased and the depth of penetration decreases.

Numerical and experimental results quoted in published papers show a good agreement with that of the presented work.