Showing papers in "International Journal of Mechanical Sciences in 1974"

TL;DR: In this article, a general-purpose computer program, VIPASA, is presented for determining the critical buckling stresses or natural frequencies of vibration of thin prismatic structures, consisting of a series of plates rigidly connected together along longitudinal edges.

TL;DR: In this article, the vibration characteristics of stepped thickness plates of rectangular geometry with simply supported edges are investigated through an exact analysis, and numerical calculations have been made for various combinations of thickness step, step-length ratio and side ratio.

TL;DR: In this paper, a stretch flanging operation on a flat circular sheet with a hole in the center has been analyzed by means of a total strain membrane theory of rigid-plasticity which incorporates strain hardening and anisotropy in the direction normal to the sheet.

TL;DR: In this article, the authors examined the vortex shedding mechanism for the formation of weld interface waves and identified an area which might eventually lead to both a quantitatively and qualitatively accurate description of the mechanism producing the interface waves.

TL;DR: In this article, closed-form solutions for stresses and displacement in an anisotropic rotating circular disk of variable thickness and variable density were obtained, and it was found that the stresses induced are lower when the mass density of the material of the disk increases radially.

TL;DR: In this paper, a rigorous solution for the theoretical indentation of a rigid-perfectly plastic solid by a rigid sphere is obtained and compared with the experimental indentations of a near perfectly plastic material.

TL;DR: In this article, a simple slip-line field solution for asymmetrical hot rolling is investigated and used to predict the sign and magnitude of the curvature of the rolled strip, compared with measurements from a two high model rolling mill.

TL;DR: In this article, an initial post buckling analysis for the rotationally symmetric branching of a cylindrical shell with a free edge following the linear eigenvalue analysis of Ashwell is presented.

TL;DR: In this article, the authors use the Reynolds, Froude or Cauchy numbers for scaling ship ice-breaking resistance from tests of models in ice-towing-tanks.

TL;DR: The analysis of ring compression with barreling, spread in Steckel rolling, and thickness change in tube sinking were carried out in an attempt to explore Hill's general method for the analysis of metal-working processes as mentioned in this paper.

TL;DR: In this paper, the authors examined the mechanics of the creeprupture test and showed that for small eccentricities of loading the rupture time is significantly reduced from the value corresponding to zero eccentricity.

TL;DR: In this article, it was shown that under present-day practical conditions, the thicknesses of the lubricant films relative to surface roughnesses are insufficient to maintain full fluid film lubrication.

TL;DR: In this paper, a three-dimensional forming limit diagram is presented which can be used to determine the probability of failure of an element which is stretch formed to a particular strain level.

TL;DR: In this article, a numerical finite element and a corresponding experimental investigation was conducted to study wave transients in an axisymmetric model head-helmet system induced by short-duration impact loading.

TL;DR: In this paper, the authors compared the experimental results with a theoretical yield locus based upon a yield criterion proposed for solids that are both anisotropic and pressure dependent in regard to macroscopic yield behavior.

TL;DR: In this article, approximate containment design formulas are developed for prediction of the maximum wall deformation of a cylindrical vessel due to detonation of a centrally located bare spherical high-explosive charge.

TL;DR: In this paper, the first five frequencies and modal shapes for the free lateral vibration of uniform double-span uniform beams are derived for the entire family of beams regardless of the location of the intermediate support.

TL;DR: In this paper, an approximate analytical solution is derived and tentatively compared with experimental results from explosive sheet metal forming, though the conditions are somewhat different from those of Tresca's yield condition.

TL;DR: In this article, complete formulas and curves for transverse displacements of the order of the beam thickness were obtained for a simply supported beam, which can undergo a relative axial displacement proportional to the induced axial force.

TL;DR: In this paper, the permanent strain distributions and the instability and fracture conditions are observed in the spinning of disks of vacuum remelted alloy steel, and it is shown for hollow disks of uniform thickness that at instability two “necks” form at either side of the bore and the bore becomes oval with the direction of the minimum diameter passing through the two necks.

TL;DR: In this paper, the influence of shearing stresses arising due to angular acceleration in a rotating disk on yielding has been examined using von Mises yield criterion and yield loci are plotted for both uniform and non-uniform thickness disks.

TL;DR: In this article, a quasistatic, frictionless indentation problem for an incompressible elastic layer(s) bonded to a rigid cylinder is solved by use of a stress function in the form of a series.

TL;DR: In this paper, two slip-line fields are shown to cover a range of indentor width to strip thickness ratios for which the strip will lift off from the base at each side of the indentor and the predicted rate of upward rotation of the strip ends over this range is compared with existing experimental observations.

TL;DR: In this article, the results of an experimental study of the fracture of solid spheres and circular disks due to the explosion of a detonator on the surface are presented and a simple analysis is developed which reasonably explains the nature of the characteristic fracture patterns encountered.

TL;DR: In this paper, a frequency-dependent friction coefficient for laminar pipe flow of compressible fluids is derived based on the Iberall model of fluid transients, which is of particular utility in the description of fluid motions which are naturally periodic and where the dependency of skin friction on frequency of excitation can be accounted for by expressing the coefficient in terms of the dominant frequency of the system.

TL;DR: In this paper, the tensile behavior of continuous filament yarns with fibres which are made from elastic-perfectly plastic or various viscoelastic materials is discussed, and theoretical expressions are developed for the maximum load carrying capacity (limit load) and creep characteristics when the displacements of a yarn remain small.

TL;DR: In this paper, a simple analysis of the stresses at the interface between the tyre and the core enables the load above which slip begins to be calculated, and an analogy is drawn between the creep motion of the tire and the movement of an edge dislocation through a crystal.

TL;DR: In this article, a polar symmetric transient thermal problem for a hollow sphere of strain-hardening material, the inner boundary of the sphere being subjected to a sudden temperature rise, was solved numerically.

TL;DR: In this article, the optimal layouts appropriate to cases where the plate edge is supported on (deflecting) edge beams and hence work is done and energy is stored or dissipated in the boundary zone are considered.

TL;DR: In this article, it was shown that the most convenient element of those tested, able to calculate stresses accurately in arches of all proportions, is found to be the strain element, introduced by earlier research and previously shown to be superior to all those tested when used for calculating displacements and natural frequencies.