Showing papers in "International Journal of Mechanical Sciences in 1996"

TL;DR: In this paper, it was shown that quadrature rules may also be formulated for irregular domains using the natural-to-Cartesian geometric mapping technique. But the application of the technique is demonstrated through the vibration analysis of thin isotropic plates of general quadrilateral and sectorial planforms.

TL;DR: In this paper, an approximate analysis of rectangular plates resting on Winkler foundations based on the Mindlin plate theory is presented, where the plates are subject to any combination of free, simply supported and clamped boundary conditions.

TL;DR: In this paper, an improved analysis method for the interpretation of the vibration data measured at turbomachinery blade tips using optical laser probes is presented, which includes the structural and geometric properties of the bladed-disk assembly, the external forcing terms and the characteristics of the optical probe.

TL;DR: In this paper, the use of ductile fracture criteria in conjunction with the finite element method for predicting failures in cold bulk metal forming is described, and a general good agreement is found.

TL;DR: In sheet metal forming operations, the principal failure modes are localized necking or wrinkling, and the strain in the sheet at the time when localization occurs is usually referred to as the Limit Strain, i.e. the principal surface strains ∈11 and ∈22.

TL;DR: In this paper, the creep and creep rupture behavior of two, significantly different, aeroengine materials, namely a nickel-base superalloy at 700°C and a high temperature titanium alloy at 650°C, were studied.

TL;DR: In this article, the authors evaluated the reduction in the collapse pressure of long cylinders which have local dents through a combination of experiment and analysis, and they found that the reduction was dependent on the maximum ovalization of the most deformed cross section (Δ0d).

TL;DR: In this paper, the authors applied the global method of generalized differential quadrature (GDQ) for the first time to study the free vibration of isotropic conical shells.

TL;DR: In this article, an exact piezothermoelastic solution is presented for infinitely long, simply-supported, orthotropic, piezoelectric, flat panel in cylindrical bending under pressure, thermal and electrostatic excitation.

TL;DR: In this paper, a physical model to calculate the fluid-dynamic behavior and energy conversion in turbocharger turbines for internal-combustion (I.C.) engines is presented.

TL;DR: The results of a theoretical and finite element investigation of an impression creep test method using a long rectangular indenter under plane strain conditions, rather than the conventional cylindrical indenter, are presented in this paper.

TL;DR: In this paper, the buckling behavior of rectangular Mindlin plates with two parallel edges simply supported, one edge free and the remaining edge free, simply supported or clamped, was investigated by applying the concept of state space to the Levy-type solution method.

TL;DR: In this paper, the authors theoretically predict the plastic resistance and the plastic work in blanking and tearing of ductile metal plates and apply the Blanking Model with a moving fracture front to predict the shear force, plastic work, and shape and size of the plastic shear zone.

TL;DR: In this article, the role of hardening laws and surface roughness in the prediction of biaxial tensile limit strains of two A1 alloy sheet materials with different strain hardening characteristics was assessed.

TL;DR: In this article, the response, buckling and collapse of long, thin-walled, seamless steel square tubes under pure bending using a combined experimental and analytical approach was addressed.

TL;DR: In this article, three initial textures characteristic for aluminium sheets have been selected to study the effect of the initial textures as well as their development on the forming limits, and it is demonstrated that both the initial texture and their subsequent development have important influences on the limit strains.

TL;DR: In this paper, the authors present a three-dimensional model of cutting forces in peripheral end milling in terms of material properties, cutting parameters, machining configuration, and tool/work geometry.

TL;DR: In this paper, the conjugate load/displacement method is used to analyze square plates with perforations, and results are presented for geometries with rectangular holes offset from one or both axes of symmetry.

TL;DR: In this article, the authors used the perturbation technique developed by Dudzinski and Molinari [Int. J. Solids Struct. 27, 601 (1991) to predict the forming limits of sheet metals.

TL;DR: In this paper, a hole-flanging operation on a flat circular sheet with a hole in the center is simulated by an incremental elasto-plastic finite-element method, which incorporates strain-hardening and anisotropy in the direction normal to the sheet, with care taken to describe the boundary conditions of penetration, separation and the alternation of the sliding-sticking state of friction.

TL;DR: In this paper, the idea that in-plane pure shear can be used for reaching "infinite" forming strains is examined via the bulging process of thin walled tubes, and an optimized loading path for maximizing the concave bulging strain between the above opposing trends was experimentally explored, guided by a limit analysis formulation.

TL;DR: In this paper, a free vibration analysis of cantilevered arbitrary triangular plates based on the Mindlin shear deformation theory is presented, and the results are valuable to design engineers for checking their natural frequency calculations and may also serve as benchmark values for future numerical techniques and software packages for thick plate analysis.

TL;DR: In this article, the prediction of blank shapes using the method of plane strain characteristics was dealt with, where the material is assumed to be an incompressible, non-hardening, isotropic solid, and ideal blank shapes are developed when deep drawing prismatic cups.

TL;DR: A mathematical model for asymmetrical clad sheet rolling is proposed by using the stream function method and the upper bound theorem to investigate the plastic deformation behaviour of sheets at the roll-gap as discussed by the authors.

TL;DR: In this paper, a model for estimating gas and melt flows during gas-assisted injection molding of a thin plate designed with a gas channel of semicircular cross section was presented.

TL;DR: In this article, closed form solutions for bending beams with linearly and (in the binomial form) parabolically varying depth and width along the beam's length are presented.

TL;DR: In this paper, a simple and accurate approach to modeling deformation processes that are highly constrained by boundary conditions is presented, which involves a detailed finite element analysis of the most controlling aspects of the process.

TL;DR: In this paper, a homogeneous deformation solution and an inhomogeneous method for calculating the roll pressure are reformulated as a development of the classical theories of flat rolling, which simplifies the computations, leads to consistent estimates of the main rolling parameters including the calculation of the roll torque and allows more general yield stress functions to be readily included in solutions for hot or cold rolling.

TL;DR: In this paper, Hamilton's variational principle is used for the derivation of equations of transversally isotropic laminated annular plates motion Nonlinear strain-displacements relations are considered Linearized vibration and buckling equations are obtained for the annular plate uniformly compressed in the radial direction.

TL;DR: In this paper, the problem of crack identification in a cantilever when clamp rigidity is unknown, and may change with time, is studied, and an identification method is developed, which requires monitoring of three natural bending frequencies.