نتایج جستجو برای: Length scale effect

تعداد نتایج: 2394394  

E Jomehzadeh M Rezaeizadeh, M Shahrokhi

In this paper, a Green’s function is developed for bending analysis of micro plates under an asymmetric load. In order to consider the length scale effect, the modified couple stress theory is used. This theory can accurately predict the behavior of micro structures. A thin micro plate is considered and therefore the classical plate theory is utilized. The size dependent governing equilibrium e...

Journal: :Physical Review Letters 2015

Journal: :journal of solid mechanics 0
a fatahi-vajari department of mechanical and aerospace engineering, science and research branch, islamic azad university, tehran, iran a. imam department of mechanical and aerospace engineering, science and research branch, islamic azad university, tehran, iran

this paper investigates the lateral vibration of single-layered graphene sheets based on a new theory called doublet mechanics with a length scale parameter. after a brief reviewing of doublet mechanics fundamentals, a sixth order partial differential equation that governs the lateral vibration of single-layered graphene sheets is derived. using doublet mechanics, the relation between natural f...

Journal: :Physical review letters 2015
Andreas Kehlberger Ulrike Ritzmann Denise Hinzke Er-Jia Guo Joel Cramer Gerhard Jakob Mehmet C Onbasli Dong Hun Kim Caroline A Ross Matthias B Jungfleisch Burkard Hillebrands Ulrich Nowak Mathias Kläui

We investigate the origin of the spin Seebeck effect in yttrium iron garnet (YIG) samples for film thicknesses from 20 nm to 50  μm at room temperature and 50 K. Our results reveal a characteristic increase of the longitudinal spin Seebeck effect amplitude with the thickness of the insulating ferrimagnetic YIG, which levels off at a critical thickness that increases with decreasing temperature....

1999
Ashish Mahabal Ajit Kembhavi P. J. McCarthy

We present de Vaucouleurs’s effective radii in B and R bands for a sample of Molonglo Reference Catalogue radio galaxies and a control sample of normal galaxies. We use the ratio of the scale lengths in the two bands as an indicator in order to show that the radio galaxies tend to have an excess of blue color in their inner region much more frequently than the control galaxies do. We show that ...

A Fatahi-Vajari A. Imam,

This paper investigates the lateral vibration of single-layered graphene sheets based on a new theory called doublet mechanics with a length scale parameter. After a brief reviewing of doublet mechanics fundamentals, a sixth order partial differential equation that governs the lateral vibration of single-layered graphene sheets is derived. Using doublet mechanics, the relation between natural f...

Journal: :international journal of nano dimension 0
a. tourki samaei young researchers club, chalous branch, islamic azad university, chalous, iran. sh. hosseini hashemi school of mechanical engineering, iran university of science and technology, tehran 16844, iran.

this paper proposed analytical solutions for the buckling analysis of rectangular single-layered graphene sheets under in-plane loading on all edges simply is supported. the characteristic equations of the graphene sheets are derived and the analysis formula is based on the nonlocal mindlin plate. this theory is considering both the small length scale effects and transverse shear deformation ef...

This paper deals with the effect of the intrinsic material length-scale parameter on the stability and natural frequency of a rectangular micro-plate for two different cases; fully clamped and fully simply supported. A variational formulation based on Hamilton’s principle and the modified couple stress theory is used to obtain the nonlinear governing equation of a micro-plate incorporating the ...

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