سال انتشار: ۱۳۹۰
محل انتشار: سیزدهمین همایش ملی صنایع دریایی ایران
تعداد صفحات: ۹
moslem najafi – M.Sc in Mechanical Engineering, Marine Industrial Organization, Tehran
mohammad hossein karimi – PhD Student in Marine Engineering, Marine Industrial Organizations, Tehran,
milad nurabadi – M.Sc Student in Composite Engineering, Marine Industrial Organizations, Tehran
sadegh hamzeh – M.Sc in Marine Engineering, Marine Industrial Organization, Tehran
A typical joint between the hull and bulkhead used in composite vessels is known as a T-joint. This joint is subjected toalternating tensile and compressive loading in the vertical direction for respectively hogging and sagging bendingdeformation of the hull girder. It consists of composite overlaminates over a shaped fillet to allow the transmission ofdirect and membrane shear stresses.Various improved T-joints have been designed and investigated. Some with focus on improved strength, and otherswith focus on reduced weight. This paper is aimed on the finite element analysis of composite T-joint under axialcompressive loading to investigate the influences of different shaped fillet, cores material and overlaminationprocedures on the mechanical performance of bulkhead T-joints.The composite T-joint is designed for the sandwich panels with 18 mm thick plywood and end-grain balsa cores. Hullpanel and bulkhead are joined by use of two triangular or circular plywood/end-grain balsa fillets.Analysis showed that in T-joint the predominant failure mechanism is shear failure in the core. Results showed that theoptimal properties under compressive loading are found for sandwich bulkheads with balsa core, particularoverlamination and circular fillet.