Abstract
Progressive damage and fracture of stitched JStiffened composite panels under shear loading is evaluated via computational simulation. The objective of this paper is to demonstrate a new methodology that scales up constituent material properties, stress and strain limits to the structure level, to evaluate the overall damage and fracture propagation for stitched laminates. Stiffened panels with different lay-up configurations are simulated for various damage stages, including damage initiation, growth, accumulation, and progression to fracture. Postbuckling analysis is also included to evaluate progressive fracture characteristics after local buckling of the skin. Results are compared with experimental data from the literature.
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