VALIDATION PROCEDURE FOR NONLINEAR ANALYSIS OF STRINGER STIFFENED CFRP PANELS

摘要

The allowable load bearing capacity of undamaged thin-walled stringer stiffened carbon fibre reinforced plastic (CFRP) panels loaded in compression is currently limited by its buckling load. The extension to a novel stability design scenario - to permit postbuckling under ultimate load or even more progressive to move ultimate load close to collapse -requires validated simulation procedures for this highly nonlinear topic for fast tools in the early design phase up to numerical analysis within the certification process. Different aspects of the validation process with respect to experimental investigations, nonlinear FE analysis as well as the comparison on different levels of detail are highlighted.