Abstract The spectroscopic parameters and decay channels of the axial-vector tetraquark (in what follows, T_{b:\overline{s}}^{\mathrm{AV}} ) are explored using quantum chromodynamics (QCD) sum rule method. mass coupling this state calculated two-point rules by taking into account various vacuum condensates, up to 10 dimensions. Our prediction fo...

Abstract—The present study focused on carrying out the creep analysis in an isotropic thick-walled composite cylindrical pressure vessel composed of aluminum matrix reinforced with silicon-carbide in particulate form. The creep behavior of the composite material has been described by the threshold stress based creep law. The values of stress exponent appearing in the creep law were selected as ...

This paper consolidated the improvements in mechanical properties from the past literature available using Vibratory welding technique. Vibratory welding is a promising method in eliminating the disadvantages experienced by the traditional welding like residual stress due to the electrical energy input which induces vibrations by varying the input parameters voltage, current, amplitude and freq...

Calculations are described of the elastic stress, strain, and surface displacement for a high-pressure optical window consisting of a transparent cylinder which is supported on a flat seat with an axial hole (Poulter window). Under pressure the window is compressed, and its outside surface bulges through the hole in the support. The net optical effect is to create a weak positive lens and to in...

Background and aims. The aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer. Materials and methods. Three different types of implant-abutment connections were selected for this study. Sample A: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample B: a tri-channel internal connection; and sample ...

Accurate stress field calculation of the casing-cement-stratum system is crucial for evaluating wellbore integrity. Previous models treated in-situ as boundary pressure loads, leading to unrealistic infinite displacements at infinity. This study presents a three-dimensional (3D) analytical solution within in inclined wells, considering and hydrostatic cement initial state taking into account co...

Nonlinear parametric vibration of axially accelerating viscoelastic strings is investigated via an approximate analytical approach. The standard linear solid model using the material time derivative is employed to describe the string viscoelastic behaviors. A coordinate transformation is introduced to derive Mote’s model of transverse motion from the governing equation of the stationary string....

Unsaturated constant water content triaxial compression tests with suction measurement, using an Imperial College tensiometer, and saturated consolidated undrained were conducted on reconstituted brickearth, a naturally unsaturated clayey silt from London. The results show that the effective stress can be applied to critical state line (CSL) normalized stiffness for brickearth but Bishop's vari...

In order to understand the permeability evolution of coal under different temperature and pore pressure conditions, a series experiments are carried out by simulating stress state conditions in depth, meanwhile is obtained calculation using fractional derivative method. A damage-induced model for complete stress–strain process deep considering proposed introducing non-uniform coefficient. The v...