چكيده به لاتين
Abstract:
Considering the importance of delamination and its effects on postbuckling behavior of composite structures, it is required to study and investigate this failure mode and its origin. For this purpose, advanced finite element method softwares are being used and then some approachs is required to modeling delamination propagation. In addition to delamination propagation, other failure modes can be also uccured within the layers of laminated composites and affect the postbuckling behavior of composites. In this thesis, the effects of fiber-matrix failure and delamination propagation on the postbuckling behavior of a delaminated structure up to final failure is investigated in detail. For modeling delamination propagation, the damage mechanics approach via cohesive zone modeling perspective is used. A progressive damage criteria is also used to investigate fiber-matrix failures in the composite layers. In Abaqus, the damage initiation criteria for fiber-reinforced composites are based on Hashin’s theory.
Keywords: delamination, interface element, cohesive zone model, fiber-matrix failure, progressive damage criteria
