Author
Abstract
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.
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