Journal Published Online: 01 June 1988
Volume 10, Issue 2

Compressive Strength of Composite Sandwich Panels After Impact Damage: An Experimental and Analytical Study



The effect of low speed impact on the compressive strength of graphite/epoxy sandwich panels was examined experimentally and analytically. Various impactor sizes and impact energy levels were used. Impact damage was found to decrease the compressive strength of panels in this investigation by up to 33%. The use of film adhesive as an interply layer was found to reduce the extent of damage and increase the residual compressive strength. A one-parameter model to predict compressive failure of impact damaged panels is presented. The theoretical predictions are in good agreement with experimental results. Some of the factors affecting the panel behavior are also discussed.

Author Information

Kassapoglou, C
Sikorsky Aircraft Company, Stratford, CT
Jonas, PJ
Beech Aircraft Co Corporation, Wichita, KS
Abbott, R
Beech Aircraft Co Corporation, Wichita, KS
Pages: 9
Price: $25.00
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Stock #: CTR10131J
ISSN: 0884-6804
DOI: 10.1520/CTR10131J