Optimum design of composite hydrogen pressure vessels by stochastic search methods için kapak resmi
Optimum design of composite hydrogen pressure vessels by stochastic search methods
Başlık:
Optimum design of composite hydrogen pressure vessels by stochastic search methods
Yazar:
Sayı, Abdülmecit Harun, author.
Fiziksel Tanımlama:
ix, 70 leaves: illustrarions, charts;+ 1 computer laser optical disc.
Özet:
Fiber-reinforced composite materials are extensively used in many engineering applications such as aircraft wings and frames, vehicle drive shafts, sport equipment, and pressure storage vessels. One of the reasons for the extensive use of laminated composite materials is their tailorable nature, which allows them to satisfy specific design objectives in an application. As an application, hydrogen-powered fuel cell vehicles require high amount of hydrogen to increase distance range. Hence, hydrogen is pressurized at elevated rates. Since, it is hard to satisfy safety and weight regulations for high pressure gas, composite storage vessels offering high strength with low weight are preferred. Optimization techniques are applied to the design of composite pressure vessels to maximize strength with comprising weight restrictions. In the thesis, first-ply failure optimizations of stacking sequence design of cylindrical composite pressure vessels with metal liner having 700-bar working pressure and safety factor of 2.0, have been performed using stochastic search algorithms which are Differential Evolution and Nelder Mead. Three separately categorized failure theories; Tsai-Wu, Maximum Stress and Hashin-Rotem criteria have been incorporated to failure analysis of the vessel designs. In addition, the effects of volume on the stacking sequence design have been investigated. Hence, four volumetrically separated pressure vessel designs have been considered. Change in volume has been provided by inner radius. Single objective optimization has been set to minimize failure criteria index which incorporates into classical lamination theory. Fiber orientation angles and number of plies are design variables. CPU time has been calculated to compare the workloads of algorithms. In conclusion, optimized pressure vessels have provided design targets and the difference in volume has caused variable fiber angle orientations, number of plies and CPU time.
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)--İzmir Institute of Technology:Mechanical Engineering.

İzmir Institute of Technology: Mechanical Engineering--Thesis (Master).
Elektronik Erişim:
Access to Electronic Versiyon.
Ayırtma: Copies: