نتایج جستجو برای: timoshenko theory

تعداد نتایج: 782787  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده فنی و مهندسی 1389

در این رساله، کمانش نانو لوله های کربنی با استفاده از تئوری الاستیسیته غیر محلی (nonlocal elasticity theory) مورد بررسی قرار می گیرد. در ابتدا، کمانش الاستیک نانو لوله کربنی دوجداره بر بستر الاستیک تحت فشار محوری با استفاده از تئوری تیر تیموشنکو غیر محلی (nonlocal timoshenko beam theory) مطالعه می گردد. تاثیرات محیط الاستیک، نیروی واندروالس بین نانو لوله های داخلی و خارجی و اثر مقیاس کوچک بر اس...

Journal: :Mathematics and Mechanics of Solids 2019

Journal: :Proceedings. Mathematical, physical, and engineering sciences 2014
Lifeng Wang Haiyan Hu

The thermal vibration of a single-walled carbon nanotube (SWCNT) is investigated by using the models of Euler beam and Timoshenko beam with quantum effects taken into consideration when the law of energy equipartition is unreliable. The relation between temperature and the root of mean-squared (RMS) amplitude of thermal vibration at any cross section of the SWCNT is derived via the beam models ...

1998

Extensional vibrations are analyzed in the linear theory of an elastic rod of finite length which accounts for lateral deformation. A simplified version of a theory of elastic rods is used; it is based on the concept of a directed curve as developed by Green et al. [1–3]. This simplified version is similar to Mindlin and Herrmann’s theory [4], and has been used recently by Krishnaswamy and Batr...

2011
Graeme J. Kennedy Jorn S. Hansen Joaquim R.R.A. Martins

A Timoshenko beam theory for layered orthotropic beams is presented. The theory consists of a novel combination of three key components: average displacement and rotation variables that provide the kinematic description of the beam, stress and strain moments used to represent the average stress and strain state in the beam, and the use of exact axially-invariant plane stress solutions to calibr...

Journal: :Mechanics of Advanced Materials and Structures 2021

This paper communicates an analytical study on computing the natural frequencies and in-plane deflections caused by static forces in panel walls using Euler-Bernoulli, Timoshenko, Timoshenko Goodier, Couple-stress, Micropolar-Cosserat theory. The highlights formulation of transfer matrix via state-space method spatial domain; from coupled governing equations motion that arises theory captures n...

2012
M. H. Korayem M. Shafei S. F. Dehkordi

In this paper, a comprehensive study is presented on the effect of beam's length, shear deformation and beam's theory on the dynamic modeling of single-link flexible manipulator. At the first step, Euler-Bernoulli beams theory (EBBT) is adopted. According to this model the effect of shear deformation is neglected. So, this model is only reliable for the case of slender beam. When the beam is sh...

2002
GEN-QI XU

The Riesz basis property of the generalized eigenvector system of a Timoshenko beam with boundary feedback is studied. Firstly, two auxiliary operators are introduced, and the Riesz basis property of their eigenvector systems is proved. This property is used to show that the generalized eigenvector system of a Timoshenko beam with some linear boundary feedback forms a Riesz basis in the corresp...

2009
Y. Y. Zhang C. M. Wang V. B. C. Tan

In this paper, we study the flexural vibration behavior of single-walled carbon nanotubes (SWCNTs) for the assessment of Timoshenko beam models. Extensive molecular dynamics (MD) simulations based on second-generation reactive empirical bond-order (REBO) potential and Timoshenko beam modeling are performed to determine the vibration frequencies for SWCNTs with various length-todiameter ratios, ...

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