Effect of Compressive and Shear Deformation of 2.5D Preform on its Stiffness of Composites

Transverse compaction and in-plane shear deformartion are the dominative deformation mode for woven preform during forming process. A full finite element model of the 2.5D woven composites has been established by the computed tomography (CT) in this paper. Based on the energy method, the effective orthotropic/anisotropic stiffness coefficients C ij are calculated by performing a finite element analysis (FEA) of this full cell model. Using this...