Showing papers in "Mechanics Research Communications in 2004"

TL;DR: In this paper, the induced unsteady flow due to a stretching surface in a rotating fluid, where the unsteadiness is caused by the suddenly stretched surface, was studied and solved numerically using the Keller-box method.

TL;DR: In this paper, the response of a Timoshenko beam with uniform cross-section and infinite length supported by a generalized Pasternak-type viscoelastic foundation subjected to an arbitrary-distributed harmonic moving load is studied.

TL;DR: In this paper, a closed-form solution is obtained for an antiplane crack in an infinite medium with coupled piezoelectric, piezomagnetic and magneto-elastic effects, and a conservative integral is derived based on the governing equations for magnetoelectroelastic media.

TL;DR: In this article, the authors investigated chaotic motion in a vehicle suspension system with hysteretic non-linearity, which is subjected to the multi-frequency excitation from road surface.

TL;DR: Based on rigorous operator theory, a general solution of the three-dimensional elasticity equations of equilibrium for 1D hexagonal quasicrystals is obtained in terms of four quasiharmonic functions, which are very simple and useful as discussed by the authors.

TL;DR: In this article, two flexible pneumatic actuators, McKibben and straight fiber, were modeled by finite element method, taking into account the non-linearity of the expanding rubber inner tube, and of the mechanism for transferring load to the braided cords surrounding the tube.

TL;DR: In this paper, two thermodynamically consistent large strain plasticity models are examined and compared in finite simple shear for a rigid-plastic material described by the von Mises-type yield criterion.

TL;DR: In this paper, a shoe with an instrumented sole was proposed to assess the instantaneous vertical forces and plantar pressures exerted during gait over a great number of steps, where each shoe sole is composed of one dynamometric ring and one strain gauge.

TL;DR: In this article, the motion of an infinitesimal particle under the gravitational field of (n+1) bodies in ring configuration, that consist of n primaries of equal mass m placed at the vertices of a regular polygon, plus another primary of mass m 0 = βm located at the geometric center of the polygon.

TL;DR: In this paper, a simple finite element model and a new approach were developed to predict the thermal distribution in the wire fairly accurately. But the model can be used to optimize the different parameters of the system to prevent wire breakage, which can lead to the development of a smart electro-discharge machining system with a sensor and feedback control.

TL;DR: In this paper, the propagation of elastic waves through an elastic medium submitted to an angular rotation Ω is investigated and it is shown that wave propagation is directly related to the Kibel number, where ω is the wave frequency.

TL;DR: In this article, the dynamic transfer matrix is formulated for a straight uniform and axially loaded thin-walled Bernoulli-Euler beam element whose elastic and inertia axes are not coincident by solving the governing differential equations of motion of the beam element.

TL;DR: In this article, a proper orthogonal decomposition of the flow along an inclined plate is applied to a LES simulation resulting data, and a low-dimensional dynamical model is obtained using by Galerkin projection of the Navier-Stokes equations upon the POD basis functions.

TL;DR: In this paper, a special crack tip displacement discontinuity element is developed based on the analytical solution to the problem of a constant discontinuity in displacement over a finite line segment in the x, y plane of an infinite elastic solid and the note of the crack tip element by Crouch.

TL;DR: A constitutive model is revisits, built up on the classical Fremond’s model, in order to contemplate the horizontal enlargement of the stress–strain hysteresis loop and numerical simulations present qualitative agreement with experimental data.

TL;DR: For the holonomic and non-holonomic Hamiltonian systems in phase space, the definitions and criterions of the form invariance of both Hamilton and generalized Hamilton canonical equations are given in this article.

TL;DR: In this paper, the governing equations of nonlinear planar motions around nonshallow prestressed equilibrium states of slender beams are derived using geometrically exact approach, and approximations are introduced considering unshearable extensible and inextensible beams.

TL;DR: In this article, an active control solution utilizing active magnetic bearing (AMB) technology in conjunction with conventional support bearings was proposed to reduce subsynchronous rotor vibrations in a single-disk rotor.

TL;DR: In this paper, the authors considered the thermally induced vibration in a homogeneous and isotropic unbounded body with a spherical cavity and employed the Green and Nagdhi model of thermoelasticity without energy dissipation.

TL;DR: In this article, the effect of thermal radiation on the non-Darcy mixed convection flow over a non-isothermal horizontal surface immersed in a saturated porous medium has been studied.

TL;DR: In this article, a model based technique for online identification of malfunctions in rotor systems is discussed, where the presence of fault changes the dynamic behavior of the system and this change is taken into account by equivalent loads acting on the undamaged system model.

TL;DR: In this article, a dual variational principle is presented for Trefftz finite element analysis and the stationary conditions of the variational functional and the theorem on the existence of extremum are provided.

TL;DR: In this paper, the interfacial stresses in fiber reinforced plastic (FRP)-reinforced concrete (RC) hybrid beams were studied by the finite element method and it was shown that both the normal and shear stresses at the interface are influenced by the material and geometry parameters of the composite beam.

TL;DR: In this paper, a three dimensional analytical model for crawl stroke swimming is developed in which the swimmer is modeled as a body and two arms connected to the body at the shoulder joints.

TL;DR: In this article, a numerical analysis of perpendicular cracks under general in-plane loading is performed by using a hybrid displacement discontinuity method which consists of the non-singular displacement displacements element presented by Crouch and Starfied and the crack tip displacement displacement elements by the author.

TL;DR: In this article, a two-dimensional model of viscous flow through a fibrous media is analyzed using a least squares method applied to the analytical solution of Stokes motion around a cylinder.

TL;DR: In this paper, a finite element method based on a hypoplastic constitutive law was used to simulate the formation of a spontaneous shear zone inside of cohesionless sand during plane strain compression.

TL;DR: In this paper, a crack in a ferroelectric ceramic with perfect saturation under electric loading was analyzed and the shape and size of the switching zone near a crack tip was determined based on the nonlinear electric theory.

TL;DR: In this paper, the authors used the near crack line analysis method to investigate a center crack loaded by two pairs of point tensile forces in an infinite plate in an elastic-perfectly plastic solid, and the analytical solutions are obtained in this paper.

TL;DR: The approximate dependence of a higher-order fabric tensor on a lower-order one is established based on the properties of orientation distribution functions (ODF) to simplify the fabric-tensor dependent compliance increment due to the presence of the cracks.