Analysis tools for size and shape design of laminated composite shells

Progressive failure analysis of composite shells Olcay, Yasemin; Darendeliler, Haluk; Department of Mechanical Engineering (2012) The objective of this thesis is to investigate the progressive failure behavior of laminated fiber reinforced composite shell structures under different loading conditions. The laminates are assumed to be orthotropic and the first order shear deformation theory is applied. Three-node layered flat-shell elements are used in the analysis. To verify the numerical results obtained, experimental and analytical results found in literature are compared with the outputs of the study, and the comparison is found to ...
Experimental and numerical investigation of damage process in composite laminates under low-velocity impact Topaç, Ömer Tanay; Çöker, Demirkan; Gürses, Ercan; Department of Aerospace Engineering (2016) Damage sensitivity of composites under out-of-plane dynamic loading, and its limited detectability on a structure has long remained a prominent problem in industry. In this study, simulations are compared with the real-time damage formation scheme, with the aim of increasing confidence in failure predictions. Drop-weight impact experiments are carried out on a [0/90]_s CFRP beam laminate. Initiation and progression of damage, consisting of matrix cracks and delamination, are visualized via ultra-high-speed ...
Experimental investigation of particle filtration in compression resin transfer molding of advanced composites Aydil Dalkıran, Tuğçe; Erdal Erdoğmuş, Merve; Department of Mechanical Engineering (2014) With the inclusion of particle fillers in advanced continuous fiber reinforced composites, issues such as impregnation with increased viscosity of the injected resin leading to high process pressures and possible nonhomogeneous/directional composite properties due to filtering of filler particles necessitate the study of the relations between processing parameters and the resulting particle distributions. In this study, the particle-resin interaction during compression resin transfer molding (CRTM) and resi...
Optimum design of composite laminates with curved fiber courses under strength and stability constraints Kasap, İsmail; Oral, Süha; Department of Mechanical Engineering (1996)
Failure analysis of thick composites Erdem, Melek Esra; Parnas, Kemal Levend; Department of Mechanical Engineering (2013) A three-dimensional finite element model is constructed to predict the failure of a hybrid and thick laminate containing bolted joints. The results of the simulation are compared with test results. The simulation comprises two main challenging steps. Firstly, for a realistic model, a 3D model is established with geometric nonlinearities and contact is takeninto account. The laminated composite model is constructed by 3D layered elements. The effect of different number of elements through the thickness is in...

Citation Formats

F. Cıbır, “Analysis tools for size and shape design of laminated composite shells,” Ph.D. - Doctoral Program, Middle East Technical University, 2001.