نتایج جستجو برای: trigonometric shear deformation theory

تعداد نتایج: 910797  

In this study, the new refine trigonometric shear deformation plate theory is used to study the out-of-plane vibration of the rectangular isotropic plates with different boundary conditions. The novelty of the research is that the analytical precision closed-form solution is developed without any use of approximation for a combination of six different boundary conditions; specifically, two oppo...

Journal: :iranian journal of science and technology transactions of mechanical engineering 2015
m. r. nami m. janghorban

in this article, an analytical solution is developed to study the free vibration analysis offunctionally graded rectangular nanoplates. the governing equations of motion are derived basedon second order shear deformation theory using nonlocal elasticity theory. it is assumed that thematerial properties of nanoplate vary through the thickness according to the power lawdistribution. our numerical...

Journal: :iranian journal of materials forming 2014
m.r. nami m. janghorban

in this research, the bending analysis of rectangular nanoplates subjected to mechanical loading is investigated. for this purpose, the strain gradient elasticity theory with one gradient parameter is presented to study the nanoplates. from the best knowledge of authors, it is the first time that the exponential shear deformation formulation based on strain gradient elasticity theory is carried...

Journal: :journal of applied and computational mechanics 0
m. nasihatgozar department of mechanical and aerospace engineering, science and research branch, islamic azad university, tehran, iran s. mohammad reza khalili centre of excellence for research in advanced materials and structures, faculty of mechanical engineering, k.n. toosi university of technology, tehran, iran

in this paper, the effect of different boundary conditions on the free vibration analysis response of a sandwich plates is presented using higher order shear deformation theory. the face sheets are orthotropic laminated composite that follow the first order shear deformation theory (fsdt) based on rissners-mindlin (rm) kinematics field. based on energy method and hamilton's principle, the ...

In the present study the free vibration analysis of the functionally graded rectangular nanoplates is investigated. The nonlocal elasticity theory based on the exponential shear deformation theory has been used to obtain the natural frequencies of the nanoplate. In exponential shear deformation theory an exponential functions are used in terms of thickness coordinate to include the effect of tr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1379

در این پایان نامه یک روش و راه حل بر پایه روش اجزا محدود، برای محاسبه توزیع تنش ها و تغییرمکان ها در تیر لایه ای مرکب ارائه می شود. هدف اصلی از اعمال این روش تحلیل تغییرفرمهای خمشی و برشی در تیر مرکب لایه ای غیرمتقارن است . در این تحلیل ها توابع شکل از نوع خطی و هرمیتی (hermitian) برای تغییر فرمهای برشی و خمشی استفاده شده است . این عمل متفاوت از تحقیقات گذشته بوده که در آنها توابع شکل بکار گرفت...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 1988

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