Geometrically nonlinear analysis of laminated composite shells using a macro-micro cumulative damage model

A micromechanics-based mechanistic model for progressive failure analysis of laminated composite shell structures has been developed and implemented. A finite element model for nonlinear analysis of laminated shells is coupled with a micromechanics elasticity solution for predicting failure and effective composite properties. The nonlinear laminate theory and finite element model are based on a third-order expansion of displacements through the thickness of the shell, thus allowing for both transverse normal and shearing deformations. The initiation and evolution of damage in the shell is modeled at the constituent (i.e., fiber, matrix, interphase) level using an elasticity solution for quasi-three-dimensional hygro-thermo-mechanical loading of periodically-packed continuous fiber composites. Numerical results are presented for first-ply and progressive failure of 16 layer angle-ply simply-supported beams subjected to a center load.

Geometrically nonlinear analysis of laminated composite shells using a macro-micro cumulative damage model Conference Paper