چكيده به لاتين
Sandwich structures and laminar structures, as a lightweight material, are widely used in various engineering fields. Due to the extensive use of sandwich panels in aerospace, construction and automotive industries, many efforts have been made to model bending and damage caused by bending on these materials. Considering the importance of this issue in this thesis, the bending behavior of a sandwich panel constructed of composite quadrilateral core and face sheet of the same core material has been studied using the Experimental and Finite element method. Composite sample’s made of carbon / epoxy and glass / epoxy and 5-layer top plates are woven fabrics. The quasi static three point bending test was performed using the STM-150 SANTAM machine. A silicon mold was used to make the core and the plates were made using an infusion method. To connect the core to the face sheet of erosion, the combination of resin and silica powder is used as adhesive. Calculation of the finite element method was performed using the Abaqus / Explicit solver and a subroutine-code related to it. The curve load displacement obtained from the experimental and the finite element method are in good agreement, which indicates the correctness of the simulation. By comparing the diagrams and their analysis, we finally conclude that the bending behavior of the samples is appropriate for their low weight.
