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2012
Conference Paper
Titel
Influence of mesoscopic foam structure on face sheet debonding in CFRP foam core sandwich panels
Abstract
The face sheet debonding of CFRP foam core sandwich structures under quasi-static loading is investigated by the Single Cantilever Beam test where the initial crack is loaded under global Mode I condition. The influence of the foam structure on the mesoscopic scale is studied by the use of several grades of Polymethacrylimid (PMI) foam cores varying in density and cell size. The morphological characterization of the foam structure is done by XRay computed tomography and 3d image analysis. The measured fracture toughness increases on increasing cell size of the foam core material and indicates enhanced damage tolerance concerning local debonding damages. Unfortunately the structural weight also increases on increasing cell size and related resin absorption of the foam core.
Language
English