Showing papers in "International Journal of Mechanical Sciences in 2012"

TL;DR: In this paper, the authors investigated the dynamic behavior of a nonlinear isolator supporting a lumped mass by modelling the dynamic system as a single-degree-of-freedom system.

TL;DR: In this article, various higher-order shear deformation beam theories for bending and free vibration of functionally graded beams are developed, which have strong similarities with Euler-Bernoulli beam theory in some aspects such as equations of motion, boundary conditions and stress resultant expressions.

TL;DR: In this article, a modified couple stress theory is developed for third-order shear deformation functionally graded (FG) micro beam, and the results obtained by the present model deviates significantly from those in which Poisson's effect is neglected.

TL;DR: In this article, the energy absorption of empty and foam-filled single and double tubes under oblique loading with different loading angles and geometry parameters was carried out, and the results showed that the foam filled double tubes have higher energy absorption than the empty tubes.

TL;DR: In this paper, the dynamic behavior of planar mechanical systems including revolute joints with clearance is investigated using a computational methodology, where the contact model in revolute joint clearance is established using a new nonlinear continuous contact force model, and the friction effect is considered using modified Coulomb friction model.

TL;DR: In this article, the modified Mohr-Coulomb (MMC) fracture criterion and novel extended versions of the Cockcroft-Latham (ECL) and Rice-Tracey (ERT) fracture criteria, explicitly accounting for Lode dependence, are evaluated for the cold-rolled, dual-phase steel Docol 600DL.

TL;DR: In this article, the Euler-Bernoulli beam is modeled as an assembly of uniform sub-segments connected by massless rotational springs representing local flexibility induced by the non-propagating edge cracks and a simple transfer matrix method is utilized to obtain the general form of characteristic equation for the cracked beam, which is a function of frequency, the locations and sizes of the cracks, boundary conditions, geometrical and physical parameters of the beam.

TL;DR: In this paper, two different theories are proposed to model the effect of abrasive particles concentration in the magnetorheological fluid based finishing process and a normal and tangential squeeze force model is also proposed based on the theory of rolling process.

TL;DR: In this article, the Bao-Wierzbicki ductile failure criterion is calibrated using a total of 11 specimens and the sensitivity to the mesh size and the assessment of the calibration accuracy are analyzed in detail on different components in order to verify the geometry transferability.

TL;DR: In this paper, a hybrid model for the prediction of residual stresses induced during the finish turning of a 15-5PH martensitic stainless steel with coated carbide tools is presented, which consists in replacing tool and chip modeling by equivalent loadings.

TL;DR: In this paper, a finite element model for simple wire strand under pure bending is presented and accurate bending symmetric boundary condition has been developed and applied to the periodic artificial cross-sectional end boundaries of the wire strand finite element models.

TL;DR: In this article, a closed-form formulation of higher-order shear deformation theory (RHOST) for free vibration analysis of simply supported and clamped clamped homogenous isotropic circular cylindrical shells is presented.

TL;DR: In this article, the generalized differential quadrature (GDQ) method is applied to study laminated composite shells and panels of revolution, and the results are obtained taking the two co-ordinates into account, without using the Fourier expansion methodology.

TL;DR: In this article, a two-variable refined plate theory was proposed to account for parabolic variation of transverse shear stress through the thickness, and satisfies the zero traction boundary conditions on the top and bottom surfaces of the plate without using shear correction factor.

TL;DR: In this article, a unified generalized thermoelasticity approach is composed of three distinct theories and employed to study the thermo-elastic wave propagation and reflection phenomena, the continuity condition of the stress components at the mutual boundaries of the elements and the temperature-dependency of the material properties are taken into account.

TL;DR: In this article, an analytical force model is presented to predict the forces generated during machining of metal matrix composites and investigates the effect of particle size on machining forces, such as shear force, ploughing force, and particle fracture force.

TL;DR: In this article, a triply coupled vibration and buckling analysis of composite beams with arbitrary lay-ups using refined shear deformation theory is presented, which accounts for the parabolical variation of shear strains through the depth of beam.

TL;DR: In this paper, a general solution for determining the stress distribution around holes in an infinite plate subjected to arbitrary biaxial in-plane loadings at infinity, is obtained using Muskhelishvili's complex variable method.

TL;DR: In this article, non-linear optimisation algorithms are developed and integrated with finite element (FE) analysis to determine and improve the accuracy of the elastic-plastic mechanical properties of a power-law material without the concept of dimensionless analysis and a representative strain.

TL;DR: In this paper, the forming limit diagrams (FLDs) of two ferritic stainless steel sheets of thicknesses 1 and 0.1mm were determined experimentally using the modified Marciniak test and the conventional ASTM standard test.

TL;DR: In this article, time-independent orthotropic enrichment functions are introduced for dynamic propagation analysis of moving cracks in composites by the extended finite element method (XFEM) to enhance the accuracy of basic FEM solution near a moving crack tip in orthotropic media.

TL;DR: In this paper, the authors investigated the deflection and static pull-in of microbridges based on the modified couple stress theory, a non-classic continuum theory able to predict the size effects for structures in micron and sub-micron scales.

TL;DR: In this paper, a twin bridge cyclic shear test with in-plane torsion is proposed for the identification of kinematic hardening parameters for metallic sheets, and the results show that the Armstrong-Frederick model fails to capture the cyclic response of the selected materials, especially advanced high strength steels DP600 and TRIP700.

TL;DR: In this paper, the authors present a failure surface for 5083 aluminum that can be tested in combined tension and torsion to achieve low triaxiality over a range of Lode angle.

TL;DR: In this article, general mathematical models of the included and inclination angles of a needle's cutting edge are formulated since they exert a profound influence on cutting behavior and the proposed general approach provides the foundation for designing medical needles with specific cutting edge properties.

TL;DR: In this paper, a nonlinear history of straining involving higher-order strain gradients is considered in the derivation of strain energy and the contribution of higherorder strain gradient results in non-classical equations of motion.

TL;DR: In this article, a 1.0 mm diameter tungsten carbide ball to penetration depths of around 100-200 μm is modeled using finite element (FE) method and analyzed for three steels having different yield stress and strain hardening exponent.

TL;DR: In this paper, a numerical approach was developed to predict the near surface residual stresses and plastic strain resulting from turning in orthogonal cutting configuration using the commercial finite element code Abaqus-Explicit.

TL;DR: In this paper, a numerical and experimental study of the vibration of laminated beams with damage, subjected to dynamic loading and temperature variations is presented, where the authors check the applicability of the damage detection technique based on an analysis of the Poincare maps of the beam response.

TL;DR: In this paper, the effects of compressive axial load on the forced vibrations of a Rayleigh and Timoshenko double-beam system are discussed for three cases of particular excitation loadings.