Starting off from the relationship between time-dependent friction and velocity softening, the paper presents a generalization of the continuous version of the one-dimensional homogeneous, deterministic Burridge–Knopoff (BK) model by allowing for displacements by plastic creep and rigid sliding. The evolution equations describe the coupled dynamics of an order parameterlike field variable (the ...

in this article, the effects of adding zn and conducting age hardening treatment on impression creep properties of mg-5%sn alloy have been investigated. the creep tests were carried out using impression creep method in which a cylindrical punch was used to apply the stress in range of 450 mpa < σimp < 270 mpa and at the test temperatures of 150, 175 and 200 °c. the results showed that age harde...

Abstract Creep response for isotropic axisymmetric rotating disc made of a particle-reinforced FGM has been investigated in the present study. The result obtained for non linear variation of particle distribution along the radial distance of the disc are compared with that of discs containing the same amount of particle distributed uniformly or linearly along the radial distance. The disc under...

[1] We present a unified analysis of physical properties of cataclastic fault rocks collected from surface exposures of the central Alpine Fault at Gaunt Creek and Waikukupa River, New Zealand. Friction experiments on fault gouge and intact samples of cataclasite were conducted at 30–33 MPa effective normal stress (sn′) using a double-direct shear configuration and controlled pore fluid pressur...

Investigation of vortex pinning and its relaxation is of great importance for both basic physics and technological applications in the field of superconductivity. We report a great improvement of superconducting properties in the recently discovered 112-type superconductors (Ca, La)FeAs2 through Co co-doping. High critical current density Js(5 K) > 2(*)10(6) A/cm(2) is obtained and pronounced s...

Coarsening of precipitates can have a profound effect on the mechanical properties martensitic 9–12 wt.% Cr steels, which are typically used in critical parts fossil-fuel power plants such as turbines, headers, and main steam pipes. In present study, changes precipitates’ size distribution simulated heat-affected zone two different steels (X20 P91) after aging conditions were analyzed correlate...

co(ii) and cu(ii) promoted base hydrolysis of 2-cyano, 1, lo-phenanthroline was studied. at 298.2°k, cu(ii) reaction is more efficient (by a factor of 20) than either co(ll) and its analogues ni(ii) in promoting base hydrolysis.

In this paper, Least Square Method (LSM) and Differential Transformation Method (DTM) are used to solve the problem of laminar nanofluid flow in a semi-porous channel in the presence of transverse magnetic field. Due to existence some shortcomings in each method, a novel and efficient method named LS-DTM is introduced which omitted those defects and has an excellent agreement with numerical sol...