Showing papers in "International Journal of Mechanical Sciences in 2008"

TL;DR: In this paper, the dynamic tensile characteristics of transformation-induced plasticity (TRIP)-type and dual phase (DP)-type steel sheets at intermediate strain rates ranging from 0.003 to 200 ǫ s −1 were investigated with the evaluation of stress-strain curves, the strain rate sensitivity, the fracture elongation and the effect of prestrain.

TL;DR: In this paper, a finite element (FE) model for empty thin-walled tubes was constructed and validated by available experimental and numerical data, and good agreement was observed between the results from the model with those obtained by analytical relations and experimental test data.

TL;DR: In this article, an evolutionary programming (EP) solver is employed to determine material constants arising in unified creep/viscoplastic constitutive equations based on experimental data, and a novel error definition is introduced, which has a natural unitless form and can provide a measure for true error.

TL;DR: In this article, a study has been made of effects of asymmetric rolling variables such as reductions per pass, changes in shear direction each pass, reductions in the last pass, roll rotation rate ratios, and different frictions on the upper and lower surfaces of AA1050 Al alloy sheets on the evolution of their deformation and annealing textures and grain refinement.

TL;DR: In this article, the authors investigated the dynamic buckling of imperfect FGM cylindrical shells with integrated surface-bonded sensor and actuator layers subjected to some complex combinations of thermo-electro-mechanical loads.

TL;DR: In this paper, free vibration of simply supported multi-walled carbon nanotubes (CNTs) was investigated by using the generalized shear deformation-beam theory (GSDBT).

TL;DR: The behavior of voids in a ductile material subject to simple shear or to a sheardominated stress state is analyzed numerically in this article, where an internal pressure is applied as an approximate representation of void surfaces pressed together in frictionless sliding.

TL;DR: In this paper, a dynamic model was developed, using MATLAB, and used for the prediction of the instantaneous dynamic loads of spur gears with symmetric and asymmetric teeth, and a 2-D three-tooth model for finite element analysis.

TL;DR: In this article, the effect of the material property inhomogeneity on the stress concentration factor (SCF) due to a circular hole in functionally graded panels is numerically investigated, and the results show that the SCF is reduced when Young's modulus progressively increased away from the hole.

TL;DR: In this paper, the effect of internal corrosion or erosion defects on the collapse of pipelines under external pressure was investigated on SS-304 tubes with axially uniform grooves of several thicknesses and angular spans of 6-60°.

TL;DR: In this paper, a mixed-mode magnetorheological (MR) mount is proposed and applied to the vibration control of a flexible beam structure subjected to external disturbances, and a linear quadratic Gaussian (LQG) controller is designed in order to attenuate the vibration of the structural system.

TL;DR: In this article, a rotating beam finite element in which the interpolating shape functions are obtained by satisfying the governing static homogenous differential equation of Euler-Bernoulli rotating beams is developed.

TL;DR: In this article, two arrangements of nested tube systems were considered; one standard and one optimised design were analyzed experimentally and simulated numerically using the explicit code LS-DYNA.

TL;DR: In this article, the authors derived equilibrium and stability equations of a FGM circular plate under uniform radial compression, based on the higher order shear deformation plate theory (HSDT), assuming that the material properties vary as a power form of the thickness coordinate variable z and using the variational method.

TL;DR: In this paper, the authors considered the electromagnetic and the mechanical aspects of the process as two independent problems and used the finite difference method to solve the electromagnetic equations and then treated it as a load in the mechanical problem.

TL;DR: In this paper, a dynamic finite element method for free vibration analysis of generally laminated composite beams is introduced on the basis of first-order shear deformation theory, where the influences of Poisson effect, couplings among extensional, bending and torsional deformations, shear deformations and rotary inertia are incorporated in the formulation.

TL;DR: In this paper, a finite element (FE) analysis using ABAQUS is conducted for dynamic indentation process of aluminium foams under a rigid, flat-headed indenter, where two methods of applying impact velocities are considered: the indenter is pushed into the foam at a constant velocity through the whole process or with an initial velocity which then decreases with indentation.

TL;DR: In this article, the interaction between the dynamic contact load and the tooth profile wear of POM and Nylon 66 plastic gear pairs is investigated and a dynamic model of a plastic gear pair is presented.

TL;DR: In this article, the authors compare the measurement of residual stresses by the neutron diffraction technique is compared to an analysis of a sample geometry by theoretical finite-element procedures, and the results indicate good qualitative agreement.

TL;DR: In this article, the forced transverse vibrations of an elastically connected simply supported double-beam system under compressive axial load were investigated under the assumption that the two beams of the system are continuously joined by a Winkler elastic layer.

TL;DR: In this article, a full-dimensional (3D) heterogeneous approach for FE upper bound limit analyses of in and out-of-plane loaded masonry walls is presented.

TL;DR: De Pater et al. as mentioned in this paper examined the effect of load on the contact area of an elastic block pressed against a frictional rigid plane and showed that during unloading there is continuous variation of both contact and slip/stick boundaries, with the minimum (i.e. maximum amount of separation) occurring at the minimum applied load.

TL;DR: In this article, a method for the estimation of friction coefficient is proposed based on the asymmetric rolling operation, where asymmetry is produced by operating the lower and upper rolls at different speeds.

TL;DR: In this article, the authors investigated the large deformations of an extended thick cylindrical tube under internal pressure, with emphasis on the static nonlinear behavior and instabilities of the shell.

TL;DR: In this paper, a two-dimensional frictionless contact problem of a coating structure consisting of a surface coating, a functionally graded layer and a substrate under a rigid cylindrical punch is investigated.

TL;DR: Graf et al. as mentioned in this paper proposed a new method of predicting neck formation in sheets under non-proportional loading, based on the concept of cumulative forming severity, borrowed from a macroscopic model of ductile fracture where the crack initiation is governed by the accumulated equivalent plastic strain modified by the stress triaxiality and the Lode angle parameter.

TL;DR: In this article, the deformation characteristics of a polycarbonate circular honeycomb block under uniaxial compression are quantitatively described by tracking the variations of the cells' parameters, such as the area strain and the angle of cells.

TL;DR: In this article, an eight-chain-like model consisting of Langevin springs and dashpot was proposed to account for the interaction of chains with their surroundings, revealing the roles of individual springs and the strain rate dependence of materials in the monotonic and cyclic deformation behaviors.

TL;DR: In this article, the stability and bifurcation of trivial and non-trivial steady-state responses are analyzed using Routh-Hurwitz criterion using multiple scales method.

TL;DR: The constitutive law to describe the anisotropic and asymmetric mechanical behavior of AZ31B magnesium alloy sheets at room temperature has been developed in this paper for the plane stress condition, based on the orthotropic yield criterion.