ISSN: 0884-6804
CODEN: JCTRER
Page Count: 3

Relationship Between Phase Difference and Coefficient of Restitution During Low Velocity Foreign Object Transverse Damage of Composite Plates
Lal, KM
Associate research professor, Old Dominion University, VA

Abstract

This work discusses a model to correlate the coefficient of restitution of low velocity transverse impacts of graphite-epoxy laminates with the residual deformation or central deflection at the end of the impact event. It is assumed that the energy absorbed by the target can be calibrated in terms of residual deflection, and thereby in terms of phase difference between the occurrence of impact force and central deflection to their maximas. Analysis was modeled on the basis of the experience from impact tests. Predictions are compared with the test results of impacted circular and flat plates. Experimentally measured values of coefficient of restitution and phase difference agreed well with the predicted relationship between them.

Keywords:
impact, plates, epoxy laminates, graphite composites

Paper ID: CTR10826J
DOI: 10.1520/CTR10826J
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