Showing papers in "International Journal of Mechanical Sciences in 1983"

TL;DR: In this paper, the results of an experimental investigation of axial crushing modes and energy absorption properties of quasi-statically compressed aluminium alloy tubes are presented, and the influence of tube length on these properties is discussed and quantified.

TL;DR: The bending collapse behavior of rectangular and square section tubes is studied theoretically and experimentally in this article, where a limit analysis technique is employed and a set of formulae relating the hinge moment and associated angle of rotation is derived.

TL;DR: In this paper, thin-walled circular cylinders and truncated circular cones of aluminium alloy were subjected to axial static loading and their initial axial length and the outside diameter of cylinders and frusta were kept constant whilst their wall thickness was varied.

TL;DR: In this paper, a twin shear stress yield criterion was proposed, which assumes that yielding begins when the sum of the two larger principal shear stresses reaches a magnitude C, and the initial yield function is f = τ 13 + τ 12 = σ 1 − 1 2 (σ 2 + σ 3 ) = c.

TL;DR: In this paper, the authors employed a yield function proposed by Hill and showed that the additional material parameter required by this yield function is simply related to R, the coefficient of normal anisotropy, for a number of materials.

TL;DR: In this article, the mechanics of the large deformation of a square tube under axial load is discussed and the elastic buckling load is predicted by assuming the tube to be comprised of four plates simply supported at their edges.

TL;DR: In this article, a coupling of the VIPASA stiffness matrices for different wavelength responses by means of the Lagrangian Multipliers method is proposed to deal with buckling and vibration in prismatic plate assemblies.

TL;DR: In this paper, a passive crashworthy system that dissipates impact energy by fracture and plastic deformation of metal tubes is analyzed, where the energy dissipating component is a square tube that is pressed axially against a die where it splits at the corners and curls outward.

TL;DR: A finite element method to analyse large plastic deformations of thin sheets of metal is presented in this article, which is based on an extension of the general viscoplastic flow theory for continuum problems to deal with thin shells.

TL;DR: In this paper, four sheet metals, having quite different combinations of R-values and strain-hardening behavior were tested in uniaxial tension, through-thickness compression and bulge tests.

TL;DR: In this paper, a systematic method for constructing plane Prager-structures for any system of vertical loads is outlined and illustrated with examples, where the sign of all member forces must be the same and the vertical location of all external loads is to be optimized.

TL;DR: In this article, the collapse and energy dissipation characteristics of metal tubes braced with tension members are considered experimentally and load bounding techniques are employed to estimate collapse loads of such tubes.

TL;DR: In this article, the Lagrangian multipliers are used to couple the stiffness matrices of component structures to represent connections between the structures to solve real or complex arithmetic problems formulated using real and complex arithmetic.

TL;DR: Similitude analysis has been used to obtain dimensionless parameters for peak quasi-static pressures, blowdown duration, and specific impulse for blast loading within enclosures as discussed by the authors, and three graphs are presented, along with appropriate curve fits, of the reduced (nondimensional) pressure versus a reduced energy, a reduced duration versus the reduced pressure, and a reduced specific impulse versus the increased pressure.

TL;DR: In this paper, the influence of grain anisotropy on limit-strains in biaxial stretching has been investigated using 70% Cu-30% Zn brass sheets of 1.0 and 0.5 mm thickness with regular grain structures.

TL;DR: In this paper, the same method is extended to non-parallel forces and a procedure for determining plane Prager-structures for any vertical load system plus selfweight is presented.

TL;DR: In this article, the transverse displacement of a statically loaded, rectangular plate with arbitrary boundary conditions specified on the remaining edges is generalized to the case when transverse shear deformation is taken into account.

TL;DR: In this paper, a method for simulating large plastic deformation in metal forming processes is proposed, where the elements are defined with reference to an unchanging spatial grid rather than the workpiece.

TL;DR: In this paper, the height at each peripheral position of a cup drawn from polycrystalline sheet using texture data is calculated using the orientation distribution function as a volume fraction of a certain oriented crystal.

TL;DR: In this paper, the authors analyzed the stresses and deformations in a thin ring-disk shrink fit assembly and found the interface pressure for the presumed plane stress state as a function of the interference of the fit.

TL;DR: In this article, the Fourier coefficients in the expansions representing the transverse deflection and rotations of normals to the plate midsurface are analyzed for both Mindlin's plate theory and a new plate theory, which allows for warping of transverse sections of the plate.

TL;DR: In this paper, the effect of void growth on the limit strain prediction was investigated and the classical yield function was used instead of more general form proposed recently, to assure the reliability of yield function, the analysis is confined to the steel sheets.

TL;DR: In this paper, the effect of material properties in terms of core/clad strength differential, and rate of strain hardening has been determined for two-ply and three-ply laminates.

TL;DR: In this paper, nonlinear expressions for axial, flexural and torsional displacements are incorporated in a general instability analysis based on the vanishing of the second variation of the total potential energy.

TL;DR: In this paper, the authors considered the tangential displacement at the interface between a layer and a substrate caused by a slowly moving tangential force on the surface of the layer and showed that symmetry is lost and the shear tractions have continuous derivatives at the trailing edge of the transition zone.

TL;DR: In this paper, the authors investigated the effect of Winkler-Pasternak elastic foundation parameters on the nonlinear dynamic response of shallow spherical shells and determined the values of foundation parameters (K and G ) for the minimaximum central response of the shallow shells for both the clamped as well as simply supported immovable edge conditions.

TL;DR: In this paper, the optical method of reflected caustics was employed to investigate the variation of the coefficient of friction in the roll gap during strip rolling, and an almost linear decrease of the friction coefficient was observed from a maximum value, at the entry plane to zero at the neutral plane and then a parabolic, tending to linear, increase of it, towards the exit plane.

TL;DR: In this article, two different thin-walled closed sections, one square and one rectangular, were tested in biaxial bending using displacement controlled cantilever bending tests.

TL;DR: In this paper, an experimental and theoretical study has been carried out to investigate the mechanism of crack development in cylinder heads of two-stroke diesel engines, and it is concluded that the dominant process of cracking is low cycle thermal fatigue and residual tensile stresses which appear after engine shut off.

TL;DR: In this paper, the large strain behavior of a circular membrane under uniform hydrostatic pressure is examined for materials with transversely isotropic plastic properties, and both flow theory and deformation theory of plasticity are considered.