Showing papers in "International Journal of Mechanical Sciences in 1976"

TL;DR: In this paper, a plasticity theory for porous metals is proposed and the stress-strain curves for sintered copper with various apparent densities are calculated by utilizing the basic equations.

TL;DR: In this paper, the behaviour of 2 in. dia., 0.064 in. thickness and of lengths ranging from 2 − 24 in. was examined. And three modes of deformation were identified and analyzed on the basis of plastic work considerations.

TL;DR: In this paper, a theoretical analysis of thickness and grain size dependence of the limit strain in isotropic sheet metals under biaxial tension is presented, where sheet surfaces are assumed to consist of asperities which increase proportionally with the equivalent strain and the grain diameter of the material.

TL;DR: In this paper, the behavior of simply supported circular tubes under the action of the transverse loading of a wedge-shaped indenter up to the point of maximum load is examined.

TL;DR: In this article, an incremental variational method is employed to analyse axisymmetric elastic plastic solids at large strains and then applied to the problems of stretch-forming and complete deep-drawing of a circular blank using a hemispherical punch.

TL;DR: In this article, both plain and profile rings were rolled on an experimental radial ring rolling mill to reductions as great as 70% to determine the spread when taking into account the various ring rolling factors.

TL;DR: In this paper, the influence of the geometrical parameters on the modes of deformation of the tubes is discussed in general terms, and the surface stresses are examined by means of the brittle laquer technique and strain gauges.

TL;DR: In this article, the influence of an elastic support on the vibration and stability of a non-conservatively loaded (follower force) undamped, linearly elastic system is studied.

TL;DR: In this paper, a model is presented which describes plug formation in the penetration of targets by flat-ended projectiles travelling at sub-sonic speeds, and the failure criterion adopted is based on the separation of the plug from the target by plastic shearing.

TL;DR: In this article, a modified law of damage creation, describing both timeindependent and time-dependent modes of fracture, is proposed and a formula determining the life of a specimen under prescribed cyclic load and at high temperature is derived and discussed.

TL;DR: In this paper, the load-displacement-time characteristics of cartilage are modelled in a simple analytical way, and the behavior under steady and oscillating loads is predicted numerically.

TL;DR: In this article, the maximum reduction of area obtainable, when directly drawing section from round bar, is calculated from a lower bound analysis; this reduction is less than that occurring when drawing round rod from round bars.

TL;DR: In this article, a new compaction process for the production of high density powder metallurgy (P/M) bars is suggested using a high voltage electrical discharge followed by rotary swaging.

TL;DR: In this paper, the combined influence of edge effects due to mechanical and thermal mismatch in composite laminates with free edges was investigated and it was shown that interlaminar thermal stresses may be more significant than the inter-laminar stresses due to loading only.

TL;DR: A numerical method based on the theory of multidimensional singular integral equations which can be used in principle to obtain solutions of any static boundary value problem for a three-dimensional elastic solid is described in this article.

TL;DR: In this article, the stress distribution in a scarf joint subjected to pure bending, and with arbitrary angle of scarf, is analyzed as a two dimensional elasticity problem in plane stress.

TL;DR: Chebyshev polynomials have been used to solve the problem of the large deflection of circular plates and the results have been compared with existing results as mentioned in this paper, and it is shown that the present analysis in the form of Chebysheve series has the property of rapid convergence.

TL;DR: In this paper, a theory of ricochet is proposed which permits the effect of projectile spin to be accounted for, and the critical angles for ricochet for a sphere and for a spinning cylinder are calculated.

TL;DR: In this paper, a general method for analysis of elasto-plastic beams and frames with large displacements is described, based on inversion of a flexibility matrix, which is computed from an assumed distribution of internal forces along the element axis.

TL;DR: In this article, the authors show that two simple experiments serve to determine, without approximation, the magnitude of the inertia forces in the case of a bell-ringing sound, and that the results are confirmed by laboratory tests and field observations.

TL;DR: In this paper, the critical angle for ricochet off water was shown to increase with speed to approach the theoretical limit of 18 √σ deg, but no ricochet occurs at any speed.

TL;DR: In this paper, a theoretical analysis of the behavior of short, thin-walled plain channel section struts under compression and bending is presented, and the conditions of controlled compression (end displacement) eccentricity and controlled load eccentricity are considered.

TL;DR: In this article, stress concentration fields at singular points of the boundary of rigid inclusions in an elastic matrix under conditions of generalized plane stress were investigated by the method of caustics.

TL;DR: In this article, the authors describe a computer analysis particularly designed to deal with the situation of local buckling in light-walled sheet metal constructions, which is not, by nature, particularly amenable to simple collapse analysis procedures using the well known limit theorems of plasticity.

TL;DR: In this paper, the descent of a tire rolling on a pavement on which a thin viscous fluid film is present is modeled, and asymptotic results for the load supported by the tread element and the descent time are derived for different texture patterns.

TL;DR: A single equation is developed to represent the flow in all types of ducts encountered in radial turbomachines to give the user a clear insight into the assumptions involved and lead to a computer procedure which is constructed of a series of subroutines representing the empiricism needed for each duct.

TL;DR: In this paper, the creep buckling of clamped circular cylindrical shells subjected to axial compression combined with internal pressure is investigated with special emphasis on the concept of creep stability and the accuracy of the analysis.

TL;DR: In this article, a theoretical and experimental investigation into the higher modal dynamic plastic response of fully clamped beams is reported, and it is shown that the influence of geometry changes or finite-deflection is important.

TL;DR: In this article, it was shown that there are qualitative and quantitative differences between the mechanisms of plastic deformation in metals and in glassy polymers, and that an eventual use of such polymers as models for studying plastic behavior may be made only to obtain qualitative results.

TL;DR: In this paper, a drawing theory for drawing through conical converging dies, in which the speed of the process is an essential parameter, was proposed and an explicit formula for the drawing stress is obtained.