نتایج جستجو برای: visco pasternak medium

تعداد نتایج: 238555  

Journal: :Vietnam Journal of Mechanics 2022

The present study investigates the axial vibration of double-walled nanotubes. Using nanorod continuum model with van der Waals effect, vibrational frequencies are studied. Aydogdu (Journal Vibration and Control, Vol. 21, Issue 16, (2015), 3132-3154) proposed a reliable for in nanotube. This provided detailed investigation using effects. But sometimes, wrong equation might lead to erroneous sci...

The aim of the paper is to analyze electro-thermo nonlinear vibration of a double-piezoelectric composite microplate-system (DPCMPS) based on nonlocal piezoelasticity theory. The two microplates are assumed to be connected by an enclosing elastic medium which is simulated by Pasternak foundation. Both of smart composite microplates are made of poly-vinylidene fluoride (PVDF) reinforced by zigza...

Journal: :international journal of advanced design and manufacturing technology 0
hassan rahimipour islamic azad university-khomeinishahr branch, country iran afshin manouchehrifard islamic azad university-khomeinishahr branch, country iran

the theoretical and experimental investigation on the thermo-mechanical properties of carbon nanotube (cnt) as reinforcer for oil and gas pipes has increasingly become a hot research area for many engineers and material scientists in recent years. this is mainly due to the advent of the new composite material systems that exhibit exotic material and mechanical properties as compared to the trad...

Journal: :CoRR 2017
S. Carbillet V. Guicheret-Retel F. Trivaudey F. Richard M. L. Boubakar

This study presents a new strategy for the identification of material parameters in the case of restricted or redundant data, based on a hybrid approach combining a genetic algorithm and the Levenberg-Marquardt method. The proposed methodology consists essentially in a statistically based topological analysis of the search domain, after this one has been reduced by the analysis of the parameter...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده کشاورزی 1394

in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2005
Andrej Vilfan Erwin Frey

Autonomous oscillations in biological systems may have a biochemical origin or result from an interplay between force-generating and visco-elastic elements. In molecular motor assemblies the force-generating elements are molecular engines and the visco-elastic elements are stiff cytoskeletal polymers. The physical mechanism leading to oscillations depends on the particular architecture of the a...

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