Residual Strength of In-Plane Loaded Debonded Sandwich Panels: Experimental Investigation

Approaches to Damage Assessment and Damage Tolerance for FRP Sandwich Structures

“…The local strength reduction R l may be established using a number of alternative approaches using fracture mechanics techniques, including those of Berggreen [13][14][15] and Lord and Greenhalgh [16]. The latter method uses the DEBUGS software [17,18], which was originally developed for modeling delaminations in laminates.…”

“…The GRP laminates each have quasi-isotropic, quadriaxial reinforcement and also a layer of chopped strand mat at the interface with the core and on the outer surface. Also shown is a corresponding plot based on experimental results [13,14] for panels with the same sandwich lay-ups. The test results for small debonds are affected by wrinkling and other premature failures that are not properly taken account of in the model, but the agreement for larger debonds is acceptable.…”