Showing papers in "International Journal of Mechanical Sciences in 1993"

TL;DR: In this paper, the characteristics of metal components proposed as impact energy absorbers are reviewed, focusing on the modes of deformation which stem from the axial compression of metal tubes.

TL;DR: In this paper, a new yield criterion was constructed by adding a particular pair of cubic terms to the author's 1948 quadratic, and the numerical parameters were kept to a minimum and must be determined readily from data given by standard tests.

TL;DR: In this article, the authors performed axial compression tests on round tubes of different sizes and made of aluminium and mild steel, both in as-received and annealed conditions, and found that the presence of holes in the tubes alters their mode of collapse and, as a consequence, affords the possibility of avoiding Euler buckling even when relatively much longer tubes are employed.

TL;DR: In this article, a sound, mechanics-based approach has been developed to allow conventional creep data to be obtained from impression creep test data; the reference stress method was used, to analyse the results of axisymmetric finite calculations, for this purpose.

TL;DR: In this article, a simple and exact solution was obtained directly for the Donnell-type governing equations of the free vibration of composite laminated conical shells, with orthotropic stretching-bending coupling.

TL;DR: In this article, a simple kinematic model is developed which describes the main features of the process of the cutting of a plate by a rigid wedge, and self-consistent, single-term formulas for the indentation force and the energy absorption are arrived at by relating the far-field and near-tip deformation events through a single geometric parameter, the instantaneous rolling radius.

TL;DR: In this article, a special purpose three-dimensional analysis was used to demonstrate a mechanism of initiation of propagating buckles in long tubes, to study the parametric dependence of the propagation pressure and to illustrate the effect of axial tension on the propagating pressure.

TL;DR: In this article, the behavior of thin and extruded wood-filled tubes made of sheet metal and not so thin extruded tubes filled with wood and subjected to axial crushing is studied.

TL;DR: In this paper, the authors investigated the plastic collapse of a tapered thin-walled metal inverbuckle energy absorbing tube, known as an inverbucktube, subjected to axial impact.

TL;DR: In this paper, the moment-rotation properties of square thin-walled tubes were measured up to and beyond bending collapse with a unique bending machine that was capable of applying a pure bending moment to large deflections without significant shear or tensile forces.

TL;DR: In this article, a coupled model of a thermoelastic-plastic material undergoing large deformation during orthogonal cutting with a pre-honed land simulating tool flank wear is constructed.

TL;DR: In this article, a kinematical approach is proposed for predicting the optimal shape and the deformed length of a metal sheet during cold-roll forming, before the first roll stand, where the middle surface of the sheet is described as a Coons patch depending on one geometrical parameter.

TL;DR: In this article, the problem of dynamic shakedown for a rate independent material with internal variables is addressed in the hypothesis that the load values are restricted to those of a specified load history of finite or even infinite duration, thus ruling out the possibility of indefinite load repetitions.

TL;DR: In this article, a domain decomposition method for the vibrational modeling of rectangular plates with mixed-edge boundary conditions is presented, where the complex plate domain is decomposed into small simple subdomains and the appropriate shape function of each subdomain is represented by sets of admissible orthogonal polynomials generated using the Gram-Schmidt recurrence process.

TL;DR: In this paper, the free flexural vibration of isosceles triangular plates based on the Mindlin shear deformation theory is investigated and the pb-2 Rayleigh-Ritz method is employed for solution.

TL;DR: In this paper, a compression bending kinematic model was developed to determine the resistance to collapse of thin-walled structures of simple geometry subjected to compression or bending loading, using an example of an S-frame undergoing a collision against a rigid block.

TL;DR: In this article, a new design of the uniaxial creep testpiece with slit extensometer ridges is proposed, to improve the accuracy of strain measurement during creep testing.

TL;DR: In this article, the governing equations for geometrically nonlinear, arbitrarily laminated rectangular plates reinforced by stiffeners which include piezoelectric and composite layers are presented.

TL;DR: In this paper, the effects of variable gas properties and composition on wave propagation are illustrated via the shock-tube, or Riemann, problem, where a species continuity equation is derived and coupled in a single vector equation with the three usual conservation equations; the resulting system is solved directly in conservation law form using the two-step Lax-Wendroff technique.

TL;DR: In this paper, a simple, computationally efficient and relatively accurate numerical model for the study of free vibration behavior of sectorial plates of arbitrary shape is presented based on the Rayleigh-Ritz method with a set of 2-D orthogonal polynomials as the admissible displacement function.

TL;DR: In this article, a proof-of-concept experimental investigation focused on evaluating the vibration properties of hollow cantilevered beams filled with an Electro-Rheological (ER) fluid and deriving an empirical model for predicting field-dependent vibration characteristics is presented.

TL;DR: In this paper, a large-strain elastic-viscoplastic torsion of circular tubes and solid bars of glassy polymers is investigated under fixed-end as well as free-end conditions.

TL;DR: In this article, the behavior of mild steel open tubes loaded centrally by two opposed wedge-shaped indenters is examined and the load-deflection curves have been recorded and simple empirical formulae are obtained for them.

TL;DR: In this article, a uniform one-way stiffened plate with clamped ends is modelled as a singly symmetric beam, comprised of one stiffener and its tributary plating.

TL;DR: In this article, a new rigid-plastic analysis of stiffened plates subjected to uniformly distributed blast loads is developed, and an instantaneous mode solution to their response was obtained. But this solution was extended to cover the cases of partial end fixity, material strain rate sensitivity and two-way stiffening.

TL;DR: In this paper, the authors investigated the stick-slip motion of a machine tool on the basis of a complete kinematic and kinetic model and proposed an identification technique to determine the stick slip parameters of the model.

TL;DR: In this paper, a general approach for the nonlinear dynamic buckling and stability of dissipative or nondissipative structural systems governed by autonomous ODEs is presented, where the role of the basin of attraction of a stable equilibrium point (on the prebuckling path), as well as the inset (stable) and outset (unstable) manifolds of a saddle (on a physical or complementary unstable path), are comprehensively explained.

TL;DR: In this article, a method for simulating 3D steady-state deformation in extrusion of a bar with an arbitrary cross-sectional shape is presented on the basis of the rigid-plastic finite element method.