fabrication, characterization and application of micro-/nano-rods/wires are among the hottest topics in materials science and applied physics. micro-/nano-rod-based structures and devices are developed for a wide-ranging use in various fields of micro-/nanoscience (e.g. biology, electronics, medicine, optics, optoelectronics, photonics and sensors). it is well known that the structure and prope...

Initial implant stability is crucial to cementless knee arthroplasty success. The objective of this study was to develop a physiological relevant methodology that incorporates torsion, shear, and compression forces to evaluate two tibial component designs that feature either a keel or cylindrical porous metal pegs. The data were compared with a simplified compression loading scenario. Results s...

In pedicle screw instrumentation, it is common to use one or more transfixators that crosslink the longitudinal rods horizontally. Such a horizontal transfixation (HTF) of the longitudinal rods was shown to provide an additional stability in axial rotation and lateral bending but not in flexion extension. Most significant contribution of HTF was noted in axial rotational stability because the t...

Article history: Received: 27.6.2015. Received in revised form: 26.11.2015. Accepted: 1.12.2015. This paper presents experimental and numerical study with the objective of exploring the effect of suction control on vortex-induced vibration (VIV) of a bridge deck. The vertical and torsional responses of the model with or without suction control during this experiment were measured. The results d...

In this work the aeroelastic stability of long-span bridge decks is numerically investigated. A simulation model is presented by which the aerodynamic fields and the structural motion are simultaneously and jointly simulated. The bridge deck is schematised as a bidimensional rigid body subject to elastic restraints corresponding to the torsional and the vertical degree of freedom, and the ALE f...

The microtubes are important structures in nano electromechanical system .in this study a nonlocal model is presented to investigate the static torsion behavior of microtubes made of bi-directional factionally graded material (BDFGM) subjected to a longitudinal magnetic field. Mechanical properties of BDFGM microtube varies in the radial and longitudinal direction according to an arbitrary func...

This paper set out to establish the dynamics model of shaft torsional vibration for direct-drive wind turbine with phenomenon unstable system vibration. The stability equilibrium point dynamical is investigated, and Routh–Hurwitz criterion used obtain a range values bifurcation control parameters. For stable point, domain calculated by constructing Lyapunov function. sensitivity analysis parame...

INTRODUCTION: Mechanical analogue composite bone models have been used as cadaveric bone substitutes in a wide variety of biomechanical tests. The objective of this study was to validate the diaphyseal structural properties in terms of flexural rigidity, ultimate bending strength, axial stiffness, ultimate compression strength, ultimate torsional strength, torque angle at ultimate torsional str...

The design of the nose landing gear (NLG) torsional damping is very important to avoid taxiing vibration aircraft. On one hand, increasing can suppress wheel shimmy. other if value too large, it will cause unstable aircraft direction, and latter often be ignored, which bring potential risks safety In this paper, by establishing a multibody dynamics model (MBD) taxiing, including NLG, main (MLG)...