پديد آورنده :
محبي كياباني، مصطفي
عنوان :
كمانش مكانيكي و حرارتي و ارتعاش آزاد ورق هاي ضخيم ناهمسان در ضخامت بر روي بستر ارتجاعي به كمك تئوري برشي اصلاح شده
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران
صفحه شمار :
[ده]،93ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
مجتبي ازهري
استاد مشاور :
بيژن برومند
توصيفگر ها :
روش نوار محدود
تاريخ نمايه سازي :
7/8/93
استاد داور :
محمد مهدي سعادت پور، كياچهربهفرنيا
چكيده فارسي :
6 صفحه عنوان 1 چكيده فصل اول مقدمه و كليات 1 1 مقدمه 2 1 2 كمانش ورق 4 1 3 تاريخچه كمانش ورق 5 1 4 انواع كمانش 7 1 5 روشهاي تحليل كمانش ورق 8 1 6 بستر ارتجاعي 9 1 7 مطالعات پيشين 11 1 7 1 كمانش مكانيكي 11 1 7 2 كمانش حرارتي 11 1 7 3 ارتعاش آزاد 21 1 8 هدف و تشريح مساله 21 1 9 محتواي فصلهاي بعدي 31 فصل دوم آشنايي با مواد ناهمسان در ضخامت و مدلهاي بستر ارتجاعي 2 1 مقدمه 41 2 2 مواد مركب 51 2 3 تعريف مواد ناهمسان در ضخامت 61 2 4 روشهاي ساخت و توليد 71 2 5 كاربردهاي مواد ناهمسان در ضخامت 71 2 6 مدل سازي ورقهاي ناهمسان در ضخامت 81 2 7 مدل سازي ورقهاي ساندويچي ناهمسان در ضخامت 91 2 8 بستر ارتجاعي 12 2 8 1 بستر ارتجاعي وينكلر 22 2 9 مدلهاي اصالح شده بستر ارتجاعي وينكلر 22 2 9 1 مدل بسترارتجاعي بروديچ 32 2 9 2 مدل بستر ارتجاعي هتني 32 2 9 3 مدل بستر ارتجاعي پاسترناك 42
چكيده انگليسي :
34 Thermal and mechanical buckling and free vibration of thick functionally graded plates resting on elastic foundation using refined plate theory Mostafa mohebbi m mohebbi@cv iut ac ir Date of submission 2014 06 24 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Prof Mojtaba Azhari Mojtaba@cc iut ac ir Advisor Prof Bijan Boroomand boroomand@cc iut ac ir AbstractIn recent years functionally graded plates are widely used in turbines reactor vessels aerospaces and other engineering applications due to their advantages of being able to resisthigh temperature gradient FGM s are usually made from a mixture of ceramics and metalswhich in ceramic provides the high temperature resistance due to it s low thermalconductivity and metal constituent supplies high stiffness and ductility of the plate Theproperties of this plates vary smoothly and continuously through the thickness This variationusually obtains by a power low function For simplicity and due to small variation of thePoisson s ratio It is assumed to be constant through the thickness In this thesis mechanical and thermal buckling and free vibration of functionally gradedplates resting on an elastic foundation are studied The winkler and Pasternak foundation areused to model the mechanical behavior of elastic foundation In order to consider sheardeformation refined plate theory is employed In this theory out of plane displacementincludes two components of bending w b and shear w s Distribution of shear strain isobtained by means of a hyperbolic function which satisfies the free transverse shear stresscondition on top and bottom of the plate therefore in this theory there is no need to considershear correction factor An ordinary finite strip method is used to analyse the buckling andfree vibration of plates By comparing numerical results with other references it can be concluded that using the finitestrip method in company with refined plate theory yields satisfactory results and the numberof degrees of freedom are reduced in comparison with third order shear deformation theory Results are presented for different boundary conditions in tables and graphs The effects ofaspect ratio volume fraction index elastic foundation are presented in several tables andgraphs Keywords Refined plate theory Thick functionally graded plates Mechanical buckling Thermal buckling Free vibration Finite strip method
استاد راهنما :
مجتبي ازهري
استاد مشاور :
بيژن برومند
استاد داور :
محمد مهدي سعادت پور، كياچهربهفرنيا
