Abstract
Hail strikes of possibly exceeding an energy level of 50 Joules may cause multiple-site damage to thin gauged composite airplane structures. If not repaired properly, they may trigger an extensive damage to airplane structures and disruptions to airline operations, and therefore posing a major maintenance and repair concern for the airlines. It is important both for the OEM and the airlines to be able to classify the hail strike damage for appropriate repair procedure. Therefore, this study presents a methodology to assist engineers in the classification of the repair type for hail strike damage. The methodology involves an accurate prediction of the stress and strain fields, and residual strength prediction.
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