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Showing papers in "International Journal of Mechanical Sciences in 1984"


Journal ArticleDOI
TL;DR: In this paper, the authors derived the differential equation and associated boundary conditions for a nominally uniform Bernoulli-Euler beam containing one or more pairs of symmetric cracks and achieved the reduction to one spatial dimension using integrations over the cross-section after plausible stress, strain, displacement and momentum fields are chosen.

386 citations


Journal ArticleDOI
TL;DR: In this paper, a new yield function for compressible P M materials has been derived based upon a yield criterion postulated by the authors, which was experimentally verified for the uniaxial state of compressive stress using the P M aluminum alloy X7091 as a model material, and excellent agreement was found between theoretical and experimental results for the density dependence of the yield and geometrical hardening.

350 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigate the impact of load-deflection and inertia factors on the dynamic plastic collapse of energy-absorbing structures, which is more difficult to understand than the corresponding quasi-static collapse.

257 citations


Journal ArticleDOI
TL;DR: In this article, the axial load-deformation or compression behaviour of cylinders and frusta for the two semi-apical angles used, 5° and 10°, were recorded and the modes of collapse were observed and discussed.

92 citations


Journal ArticleDOI
TL;DR: In this article, a three-dimensional finite element analysis was performed for block compression based on rigid-viscoplastic formulation, where the variational form of the equilibrium equation was made with 8-node hexahedral isoparametric elements.

84 citations


Journal ArticleDOI
TL;DR: In this paper, a method for simulating three-dimensional deformation in plate rolling and edge rolling is established on the basis of the rigid-plastic finite-element method, where simplified elements which represent three dimensional deformation with grooveless rolls are developed.

67 citations


Journal ArticleDOI
TL;DR: In this article, critical lateral fluid pressure for suppression of plastic buckling of annular plates during deep drawing by hydroforming process is examined and the theoretical prediction, utilizing the energy method, is accompanied by experiments.

61 citations


Journal ArticleDOI
TL;DR: In this paper, the friction and material removal mechanisms occurring in moving contact between engineering surfaces and particularly between abrasive or polishing grits and softer work-pieces are modelled.

51 citations


Journal ArticleDOI
TL;DR: In this paper, a finite element model is described for analyzing metal flow and heating during large deformation processes such as hot rolling and particle thermomechanical histories are evaluated relative to the spatial coordinates of the computational domain.

34 citations


Journal ArticleDOI
TL;DR: In this paper, the authors show how the sub-harmonic resonances can be designed-out by increasing the damping to a prescribed level, or by varying other system parameters, and show that the values of damping needed to eliminate all subharmonic motions are of the order of magnitude of those that could be achieved in realistic design situations.

34 citations


Journal ArticleDOI
TL;DR: In this paper, a theoretical analysis based on axisymmetric bending or stretching of rigid-perfectly plastic plates is presented, which well accounts for the experimental variations in stamping force during pressing and the final curvature of the deformed plates.

Journal ArticleDOI
J.F. Wilson1
TL;DR: Theoretical and experimental studies on bellows published since the first analysis in 1932 are reviewed in this paper, where the key results dealing primarily with load-deflection behavior are summarized and compared to those predicted by classical beam, plate, and shell theories.

Journal ArticleDOI
TL;DR: In this paper, numerical solutions for plane-strain strip drawing employing an experimentally determined stressstrain curve and measured die-interface velocities are presented. But the results of these numerical solutions were not compared with experimental values of these same quantities.

Journal ArticleDOI
P. Bate1
TL;DR: In this article, the authors measured the limit strains achieved in stretching two low carbon steel sheets and compared with predictions made using a discrete slip model of plastic flow in conjunction with an initial defect analysis, which allowed the effects of crystallographic preferred orientations to be taken into account in a realistic manner.

Journal ArticleDOI
Dong-Yol Yang1, K. Lange
TL;DR: In this paper, a new method of die construction is proposed, which enables the exact geometrical control of die shape and ensures the initial sealing between billet and die, and the internal metal deformation is analyzed with the aid of a special transformation combined with the upper-bound method.

Journal ArticleDOI
TL;DR: In this article, the axisymmetric bifurcation and post-bifurcation behavior of circular tubes subjected to the combined action of axial tension and internal pressure are investigated numerically using the finite element method.

Journal ArticleDOI
TL;DR: In this paper, the axisymmetric full-range response of transverse pressure loaded, clamped, and simply supported, circular plates is investigated and the solution of the finite-difference approximations to the governing equations using the Dynamic Relaxation method is briefly outlined together with several refinements for improving computational efficiency.

Journal ArticleDOI
TL;DR: In this article, all four simplified cases of the 1979 criterion have been proposed and all four cases are analyzed to determine the interrelationships of the parameters r and m (exponent in Hill's new criterion) required to encompass anomalous behaviour.

Journal ArticleDOI
TL;DR: In this paper, the authors considered the peak local stresses occurring at sharp re-entrant corners in plates under remote transverse loading, whereby "sharp" is meant zero root radius of curvature.

Journal ArticleDOI
TL;DR: In this article, the effects of various parameters on the natural frequencies of axisymmetric clamped plates and simply supported plates subjected to initial stresses are investigated, where the initial stress is a combination of a pure bending stress plus an extensional stress in the plane of the plate.

Journal ArticleDOI
TL;DR: A power-law relationship between the average erosion rate and cumulative erosion is presented in this paper, where data analyses from Venturi, magnetostriction, and liquid-impingement devices conform to this unified relation.

Journal ArticleDOI
TL;DR: In this article, the results of experiments on 2-bar structures of 99.9% copper are compared with the prediction of classical plasticity models for loading histories which simulate the effects of thermal cycling in the presence of constant primary loading.

Journal ArticleDOI
TL;DR: In this paper, an analysis of drawing and extrusion processes of viscoplastic solids through wedge-shaped and conical dies is presented, and explicit expressions for the stress field within the working zone are derived.

Journal ArticleDOI
P. Bate1, D.V. Wilson1
TL;DR: In this article, the development of strain localisation in a biaxially stretched sheet of work hardening material which contains a regular array of axisymmetric defects has been analysed by the finite element method.

Journal ArticleDOI
TL;DR: In this paper, a new approach to the statics of thick, elastic plates is presented, which incorporates transverse normal stress and strain effects as well as those due to transverse shear deformation.

Journal ArticleDOI
TL;DR: In this article, a finite element analysis is presented for warm forming problems using the constitutive model originally proposed by Hart, which is capable of using any of a class of combined creep-plasticity constitutive models with state variables for the description of material behavior.

Journal ArticleDOI
TL;DR: In this article, a set of creep experiments conducted on 316 austenitic stainless steel in a coupled pair of uniaxial creep testing machines which simulate the performance of a two bar structure subjected to constant mechanical and cyclic thermal loading in the temperature range of 550-600°C.

Journal ArticleDOI
TL;DR: In this paper, the authors consider the thermoelastic Hertz contact problem and assume a contact resistance which is inversely proportional to the contact pressure, and propose a solution that takes into account this nonlinear behavior.

Journal ArticleDOI
TL;DR: In this article, the influence of void formation at inclusion particles on strain localisation in biaxial stretching was explored in two different grades of low-carbon steel sheets, including rimmed steel and aluminium-killed steel.

Journal ArticleDOI
TL;DR: In this article, two theoretical analyses of the plastic behavior and work-hardening characteristics of medium carbon steel (En8) were presented, one using Perzyna's visco-plastic constitutive law and the other using the strain-rate independent theory of Prandtl and Reuss.