Πλοήγηση ανά Θέμα "Mechanics"
Αποτελέσματα 21-40 από 202
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Collapse of pressurized elastoplastic tubular members under lateral loads
(2004)The present work examines the collapse of tubular members subjected to lateral (transverse) quasi-static loading in the presence of uniform pressure. In particular, it investigates pressure effects on the ultimate lateral ... -
Complex Dynamics in Non-linear Real Estate Models
(2013)In the present paper we study the complex dynamics of non-linear cobweb models of real estate markets in discrete time. Our model incorporates two sub-markets, land and housing, interacting with each other. We start by ... -
Conductive heat transfer in a rarefied polyatomic gas confined between coaxial cylinders
(2014)The conductive heat transfer through rarefied gases composed by rigid rotators and confined between coaxially placed cylinders maintained at different temperatures is investigated on the basis of the Holway and Rykov kinetic ... -
Conical indentation of incompressible rubber-like materials
(2009)In the last decade, the indentation test has become a useful tool for probing mechanical properties of small material volumes. In this context, little has been done for rubber-like materials (elastomers), although there ... -
Constitutive modeling of porous viscoelastic materials
(2007)The effect of porosity on the constitutive response of an isotropic linearly viscoelastic solid that obeys a constitutive law of the standard differential form is investigated under small strain deformation conditions. The ... -
Constitutive modeling of solid propellant materials with evolving microstructural damage
(2008)Solid propellants are composite materials with complex microstructure. In a generic form, the material consists of polymeric binder, crystal oxidizer (e.g., ammonium perchlorate), and fuel particles (e.g., aluminum). Severe ... -
The constrained buckling problem of geometrically imperfect beams: a mathematical approach for the determination of the critical instability points
(2015)The constrained buckling problem of geometrically imperfect beams with intermediate unilateral supports is studied in the present paper. The proposed methodology offers the ability to calculate analytically the critical ... -
The contact problem of a circular rigid punch on piezomagnetic materials
(2007)In this project; a general theory for the axisymmetric indentation of piezomagnetic solids by a fiat rigid punch is presented within the context of fully coupled linear model, in the absence of friction or adhesion. It is ... -
Denting of internally pressurized tubes under lateral loads
(2006)The present work examines the structural response of tubular members subjected to lateral quasi-static loading, imposed by wedge-shaped denting devices, in the presence of internal pressure. First, tubes are modeled with ... -
Dependence of contact area on the resolution of fractal interfaces in elastic and inelastic problems
(2011)Purpose - The purpose of this paper is to investigate the influence of the resolution with which interfaces of fractal geometry are represented, on the contact area and consequently on the contact interfacial stresses. The ... -
Dependence of friction coefficient on the resolution and fractal dimension of metallic fracture surfaces
(2013)The paper studies the friction mechanism that is developed between metallic fracture interfaces of fractal geometry. The main purpose of the paper is to investigate how both the resolution and the fractal dimension of the ... -
Derivation of strain gradient length via homogenization of heterogeneous elastic materials
(2013)We present explicit upper bound estimates of the microstructural length used in simple gradient elasticity. Our model is a two dimensional composite made of circular hard inclusions randomly dispersed in a soft matrix. ... -
Design optimization of quarter-car models with passive and semi-active suspensions under random road excitation
(2005)A methodology is presented for optimizing the suspension damping and stiffness parameters of nonlinear quarter-car models subjected to random road excitation. The investigation starts with car models involving passive ... -
Determination of the load - displacement curve of moment resisting steel frames under horizontal loading
(2001)Seismic resistant steel frames are very common in regions of high seismic risk due to their excellent characteristics in terms of strength and ductility. For the evaluation of the total ductility, various methods have been ... -
Dipolar gradient elasticity of cables
(2012)The increasing structural use of cables and cable-systems has given rise to a substantial technical literature concerning their static and dynamic response. However, the majority of these works is based on classical ... -
Direct derivation of response moment and cumulant equations for non-linear stochastic problems
(2000)A relatively straightforward formulation is presented for deriving the differential equations governing the evolution of the response moments and cumulants of a dynamical system. This is a very general framework that applies ... -
Direct numerical simulation of a heat removal configuration for fusion blankets
(2007)A series of direct numerical simulations (DNS) are performed to study the natural convection heat transfer between concentric cylinders at several Rayleigh and Hartmann numbers. The buoyant flow is driven by the temperature ... -
A dissipative particle dynamics study of flow in periodically grooved nanochannels
(2012)The effect of periodic rectangular wall roughness on planar nanochannel flow is investigated by dissipative particle dynamics simulation. The wall protrusion length is varied, and its effect on the flow is examined. Analysis ... -
The driven cavity flow over the whole range of the Knudsen number
(2005)The flow of a rarefied gas in a rectangular enclosure due to the motion of the upper wall is solved over the whole range of the Knudsen number. The formulation is based on the two-dimensional linearized Bhatnagar-Gross-Krook ... -
Effect of channel width on the primary instability of inclined film flow
(2010)A procedure is developed to detect the onset of interfacial instability in inclined film flows (with estimated accuracy better than 5%) and is used to show that the finite width of experimental channels stabilizes the ...