Damage and Compressive Failure of Unbalanced Sandwich Composite Panels Subject to a Low-Velocity Impact.

摘要

An unbalanced sandwich composite structure consisting of titanium and glass reinforced plastic (GRP) facesheets with a phenolic honeycomb core will be used for construction of a surface ship mast. Principle areas of concern in using these composites in primary load-bearing applications are the response due to compressive loads and the effects of low-velocity impact damage. This research focuses on experimental studies of the compressive strength after impact (CAI) of unbalanced sandwich composite beams. The beams, in simply supported configurations, are impacted transversely and then subjected to a compressive axial loads. Samples are impacted on both the titanium and GRP sides. Additionally, the composites are statically loaded on each side. This study investigates initiation and progress of damage in the unbalanced sandwich beams caused by various impact loads. In addition, effects on the compressive failure load resulting from the various impact loadings are examined.