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| ENERGY AND CONTACT FORCE STUDY OF COMPOSITE LAMINATE IMPACT DAMAGE RESPONSE |
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Abstract Abstract： Three layups of Composite laminate are tested about dropping weight and CAI. The impact response is recorded, and parameters like contact force and energy are analyzed on their characteristics and diversity. It is discovered that the shape of contact force versus time curve apparently changes while the energy level increases, relative to the laminate’s damage resistant ability. Impact energy, absorbed energy and damage dissipated energy are obtained and their relationships with dent, delamination and CAI strength are analyzed and discussed. Results show that damage is more linearly relevant to impact energy than absorbed energy, although the latter seems to be more account theoretically. Maximum contact force is no way to characterize damage, for the test data tell that it is only a threshold due to the laminate’s resistant ability. Additionally, the impact is simulated via ABAQUS. Response curves are obtained and damage is predicted, both of which fit the testing results.
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Received: 10 October 2011
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2013, Vol. 34 
