The following extends existing work done by Cosentino and Weaver on predicting crack initiation in discretely assembled skin/stringer composite panels. This allows for the anal- ysis of fully coupled systems ie. non-zero B matrix. The nonlinear structural behaviour is obtained by means of the von Karman formulation for moderately large deections in plates; three-dimensional assemblies are schematized and the effect of eccentricity is in- cluded in the simulation. Solutions are calculated by means of a Rayleigh-Ritz approach based on Galerkin's method, and a linear elastic fracture mechanics-based model is used to simulate the crack initiation in the critical regions. Using this method a bi-level opti- misation using lamination parameters was performed subject to closed form buckling and debonding constraints. The optimisation was performed with respect to improving the strength and overall load carrying capacity for a fixed geometry. The results show through the use of layup optimisation incorporating exure-membrane coupling effects debonding can be reduced.
|Title of host publication||Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference|
|Publication status||Published - 1 Dec 2012|
|Event||53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Honolulu, HI, United States|
Duration: 23 Apr 2012 → 26 Apr 2012
|Conference||53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference|
|Period||23/04/12 → 26/04/12|