Showing papers in "International Journal of Mechanical Sciences in 2004"

TL;DR: In this article, a series of tests including upsetting tests, shear tests and tensile tests on 2024-T351 aluminum alloy providing clues to fracture ductility for a wide range of stress triaxiality was carried out.

TL;DR: In this article, the three-point bending collapse strength of composite-polymer foam sandwich beams with composite faces and polymer foam cores has been analyzed and an indentation model for elastic faces and an elastic-plastic core has been developed.

TL;DR: In this paper, the displacement adjustment method (DA) is used to adjust the trial die design until the target part shape is achieved, hence the term "displacement adjustment method" has been applied.

TL;DR: In this article, a model of size-dependent geometrically nonlinear response of thin elastic films with nano-scale thickness based on a continuum approach is proposed to analyze the bending, buckling and vibration of simply supported micro- and nano-films in plane strains.

TL;DR: In this paper, the authors focus on the competing collapse mechanisms for simply supported sandwich beams with composite faces and a PVC foam core subjected to three-point bending, and a failure mechanism map is constructed to reveal the dependence of the dominant collapse mechanism upon the geometry of the beam.

TL;DR: In this paper, the authors compared the energy absorption response of straight and tapered thin-walled rectangular tubes under both quasi-static and dynamic axial impact loading, for variations in wall thickness, taper angle, impact mass and impact velocity.

TL;DR: In this paper, a state equation with variable coefficients is derived in a unified matrix form for the free vibration of cylindrically orthotropic functionally graded cylindrical shells with arbitrary thickness.

TL;DR: The minimum requirements for discretization of 3D finite element models for laser forming are established by examining the convergence of the numerical solutions with increased discretized.

TL;DR: In this article, the stability analysis of a rigid rotor supported by ball bearings has been studied, where the contacts between balls and races are considered as nonlinear springs, whose stiffnesses are obtained by using Hertzian elastic contact deformation theory.

TL;DR: In this paper, the effect of using a mixture of particles of two different sizes for the compaction of spherical metallic powders by discrete element method simulations (DEM) was studied, and it was shown that bimodal compacts exhibit a stiffer response during isostatic plastic compaction compared to the monomodal case.

TL;DR: In this article, an extensive experimental programme and detailed mechanical analysis were performed to test and model the statistical response of metallic foams under complex loading conditions. But the experimental results were in good agreement with the predictions of the statistical model.

TL;DR: In this article, the response of thin clamped plates subjected to static punch indentation is investigated experimentally, analytically and numerically to determine the onset of fracture, and the accumulated equivalent plastic strain with stress triaxiality as a weighing function is introduced as ductile fracture criterion in the finite-element simulation and analytical prediction.

TL;DR: In this article, an analytical solution to the free vibration of composite beams with two nonoverlapping delaminations is presented, which includes the differential stretching between the delaminated layers and the bending-extension coupling.

TL;DR: In this article, the authors developed accurate and time efficient numerical approaches to study geometrically nonlinear vibrations of moderately thick beams under the combined action of mechanical and thermal loads.

TL;DR: In this paper, the buckling of elastic square honeycombs subject to in-plane biaxial compression is analyzed using a two-scale theory of the updated Lagrangian type.

TL;DR: In this paper, the effect of plastic deformation on the geometric instability in tube hydroforming, such as global buckling, axisymmetric wrinkling, and asymmetric wrinkles, is precisely treated by using the exact plane stress moduli tensor.

TL;DR: In this article, a first-order approximation coupling model is presented to analyze the dynamics of rotating flexible beam system, which is based on the Hamilton theory and the finite element discretization method.

TL;DR: In this paper, the free vibration of laminated two-side simply-supported cylindrical panels is analyzed by the mesh-free kp-Ritz method, where the reproducing kernel particle estimation is employed in hybridized form with harmonic functions to approximate the two-dimensional displacement field.

TL;DR: In this article, a dynamic transfer matrix method of determining the natural frequencies and mode shapes of axially loaded thin-walled Timoshenko beams has been presented, where the effects of axial force, warping stiffness, shear deformation and rotary inertia are taken into account and a continuous model is used.

TL;DR: In this paper, a non-linear mathematical model of the load sway during the jib motion was formulated, and the nonlinear nature of the swinging motion for large angles and the power transmission were considered.

TL;DR: In this paper, an efficient formulation to predict the cross-sectional distortion of extrusions with relatively arbitrary, thin-walled cross-section is presented, which can be used in the design of extrusion cross-sections and in the optimization of the process variables.

TL;DR: In this paper, the authors examined the collapse of tubular members subjected to lateral (transverse) quasi-static loading in the presence of uniform pressure and investigated pressure effects on the ultimate lateral load of tubes and on their energy absorption capacity.

TL;DR: In this paper, the active control of laminated composite plates with piezoelectric sensor/actuator patches using an efficient mesh-free method, i.e., the element-free Galerkin (EFG) method, is investigated.

TL;DR: In this article, a cylindrical rod from a round billet was carried out through steadily rotating conical dies, and the extrusion load and twist shear strain on the partially extruded billet were investigated.

TL;DR: In this article, a theoretical cutting force model for helical end milling with cutter runout is developed using a predictive machining theory, which predicts cutting forces from the input data of workpiece material properties, tool geometry and cutting conditions.

TL;DR: In this article, the authors developed the forming limit diagram of AA6082-T4 by utilizing three types of end-conditions: (i) free-end, (ii) pinched-end or fixed-end and (iii) forced-end.

TL;DR: In this article, a layerwise theory for composite and sandwich laminated plates is discretized by polyharmonic (thin-plates) splines, and the combination of adequate shear deformation theory and thin plate splines allows a very accurate prediction of displacements and stresses.

TL;DR: In this article, an anisotropic damage model is combined with a modified vertex theory to generate damage-coupled localized necking criteria on both sides of forming limit diagram (FLD).

TL;DR: In this paper, a comparative study of different schemes to solve one-dimensional (1-D) gas flow equations in tapered pipes was conducted and the results of the different schemes were compared to the experimental data and a fairly good agreement was achieved when high-resolution schemes were used but with a considerable increment of computational effort.

TL;DR: In this article, a finite element formulation for micropolar elasticity theory is derived from the potential energy functional of the discrete system, and three kinds of elements are designed and the effectiveness of these elements are investigated by a set of numerical tests.