Stress analysis of multi-phase and multi-layer plain weave composite structure using global/local approach

Detailed stress analyses of multi-phase and multi-layer (MPML) composite structures are computationally challenging due to the complexities of the microstructure. In this study, an effective bottom-up global/local analysis strategy is employed to determine local stresses in the MPML plain weave composite structures. On the basis of the finite element analysis, the procedure is carried out sequentially from the homogenized composite structure of the macro-scale to the parameterized detailed fiber tow model of the micro-scale. The bridge between two scales is realized by mapping the global analysis result as the boundary conditions of the local tow model and hence the influence of the global model refinement on the computing accuracy of local stress is particularly addressed. To verify the computing results of such a bottom-up global/local analysis, we use a refined finite element mesh of the MPML structure whose solution is considered as the standard of comparison. The proposed approach is finally applied to the MPML plain weave composite panel.