A phenomenology of isotropic magnetohydrodynamic (MHD) turbulence subject to both rotation and applied magnetic field is presented. It is assumed that the triple correlation decay time is the shortest between the eddy turn-over time and the ones associated to the rotating frequency and the Alfvén wave period. For Pm=1 it leads to four kinds of piecewise spectra, depending on four parameters: in...

When a red blood cell (RBC) is subjected to an external flow, it is deformed by the hydrodynamic forces acting on its membrane. The resulting elastic tensions in the membrane play a key role in mechanotransduction and govern its rupture in the case of hemolysis. In this study, we analyze the motion and deformation of an RBC in a simple shear flow and the resulting elastic tensions on the membra...

The paper presents a simple and efficient method for identifying two-parametric isotropic pressure-independent yield criteria. experimental procedure includes the upsetting of three types specimens. cylinders rings is used to evaluate effect friction. Together with plane strain compression in die, these tests provide two points locus on π-plane. conjunction plasticity theory based Hosford’s cri...

We consider the problem of determination elastoplastic stress-strain state a matrix containing an elliptic inclusion different material in presence arc-shaped crack on interface under action mechanical loads applied at infinity, which can be arbitrarily oriented relative to crack. The appearance contact macrozones between faces is regarded as possible. use model isotropic hardening materials wi...

Electronic power modules devices are paramount components in the aeronautical, automotive and military applications. The solder layers are the most critical parts of the module and are usually subjected in their whole life to complex loading conditions. To improve the design task, realistic thermoelastoviscoplastic and lifetime prediction models which can describe efficiently the deformation-da...

INTRODUCTION: Surgical intervention for the treatment of low back pain over the last decade has often included the use of interbody fusion devices (IFDs). Implanted into the intervertebral space, these devices serve as structural support until fusion occurs. Numerous experimental investigations have evaluated the acute kinematic stability and/or monotonic strength of the implant-vertebrae const...

A number of robust, and computationally efficient, algorithms are presented for the development of an overall strategy to estimate the material parameters characterizing a class of complex viscoplastic material models (i.e., rate dependent plastic flow, nonlinear kinematic hardening, thermal/static recovery, isotropic and anisotropic, etc.). The entire procedure is automated through the integra...

Abstract Block braked railway wheels are subjected to thermal and rolling contact loading. The loading results in high temperatures stresses which cause slow time dependent processes such as creep, relaxation static recovery of the wheel material. At same time, implies a very fast mechanical load application. This paper is focused on material modeling pearlitic steel for wide range rates at ele...