4678

4406

كارشناسي ارشد

طراحي كاربردي

اصفهان: دانشگاه صنعتي اصفهان،دانشكده مكانيك

1387

يازده،127،[II]ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حسين مقبل،محمود فرزين

حسين مقبل، محمود فرزين

88/7/13

محمدرضا فروزان، محمود كدخدايي

مهندسي مكانيك

ID4406

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Application of composite failure criteria in CNG pressure vessels design By Balal Mohammad Nazari balal@me iut ac ir 2009 Department of mechanical engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisors Hosein Moghbel h moghbel@cc iut ac ir Dr Mahmoud Farzin farzin@cc iut ac irAbstractNowadays because of the shortage in the fossil fuel resources and energy crisis use ofsubstitute fuels in the automobiles must be considered One of this new fuels for theautomobiles is natural gas that for the low level of energy in the unite of volume it must bestored in the high pressures that has economical advantages For this reason we use ofpressure vessels with high pressure endurance These pressure vessels are generally in fourtypes type I full steel pressure vessels type II steel pressure vessels with compositewrapped in cylindrical part of the vessels type III composite pressure vessels with metallicsteal linear and type IV composite pressure vessels with high density polyethylene HDPE linear Because of the light weight and the safety in bursting than metallic pressure vessels the use of composite pressure vessels in automobile industry is too important so design andmodeling of these pressure vessels type IV are the goal of this research For this purpose we used of finite element analysis in ABAQUS software Geometrical parameters based onone of the industrial ways of production i e planar or polar filament winding have extractedand have been used in the model and also design parameters are define from standards Foranalysis of these pressure vessels we need a knowledge and usage of a proper failure criteriathat this works have been done in this thesis It is good to mentioned that the failure criteriafor composite material are large in number that knowledge understanding sorting andscoring of them are considered and also we mentioned to the word wide failure exercise WWFE activities in this issue Also degradation equations mainly Puck and Tsai Wufailure criteria and degradation models have been used in USDFLD subroutine that leads to anonlinear solution This nonlinear solution gives us a better behavior of composite materialbased on experimental parameters and consequently we have a pressure vessel with minimumweight to volume fraction with use of proper failure criteria and finite element method Key wordsComposite material failure criteria CNG FEA ABAQUS subroutine USDFLD

حسين مقبل،محمود فرزين

حسين مقبل، محمود فرزين

محمدرضا فروزان، محمود كدخدايي