Abstract Dynamic disasters frequently occur in deep coal mines, where coals and rocks are under high situ stresses. To reveal the failure mechanism of burying coals, specimens were made buried at a depth about 1 km. An improved Kolsky bar was applied to conduct dynamic compression experiments subjected different hydrostatic pressure i.e., 0, 5, 10, 15, 20 MPa for simulating stresses correspondi...

The Graphene based single electron transistor (SET) as a coulomb blockade device need to be explored .It is a unique device for high-speed operation in a nano scale regime. A single electron transfers via the coulomb barriers, but its movement may be prevented by coulomb blockade, so its effect is investigated in this research. The conditions of coulomb blockade and its controlling factors such...

This document presents a study of the behaviour pavement structure on compressible soil and evaluation its durability. The objective this is to highlight impact taking into account non-linear elastic soils granular materials in design process. To end, numerical modelling beau-rivage-Djassin crossroads section Porto-Novo was carried out, based whose will be considered elastoplastic. subgrade mad...

Some active fault systems comprise near-orthogonal conjugate strike-slip faults, as highlighted by the 2019 Ridgecrest and 2012 Indian Ocean earthquake sequences. In conventional Mohr-Coulomb failure theory, orthogonal faulting requires a zero frictional coefficient (pressure-insensitive), which is unlikely in brittle lithosphere. The simulations developed here show that faults can form layer i...

A new hyper-elastic formulation is proposed for improving the convergence of Mohr–Coulomb-like constitutive models at small stresses, when problems come from vicinity to apex yield surface and elastic predictor can lay in a region which not defined. The avoids stress states with tensile mean pressures provides shear bulk stiffnesses increasing square root stress, as typically occurs granular so...

Abstract The triaxial mechanical properties of hybrid basalt–polypropylene fibre-reinforced concrete (HBPRC) were investigated in detail. different effects micro-basalt fibre (BF) and micro-polypropylene (PF) on the revealed. strength criterion for HBPRC was established. results showed that hydrostatic behaviour, volumetric strain, peak deviatoric stress, elastic modulus, Poisson’s ratio are af...

Railways are one of the largest transportation networks in world. One key subgrade problems railway track is associated with progressive shear failure (PSF). To-date, limited number studies have addressed mechanism PSF, especially extending mechanics unsaturated soils. In this paper, PSF studied aid computer program that was developed using a Visual Basic AutoCAD, Mohr-Coulomb criteria within s...

in this work, a novel electrochemical technique is presented for determination of bentazonusing a nanocomposite based sensor and continuous coulometric fast fourier transformation cyclicvoltammetry (ccfftcv). in this method, the sensor response is in coulomb and is calculated based onintegrating charge changes under the current voltammogram in selected potential range. the new sensor wasconstru...

Numerical modeling is a powerful tool to determine the stress-strain relationships of structures. However, for reliable application, physical and mathematical models must be calibrated validated. This paper presents an overview numerical calibration through finite element method plate-load tests in embankment. Additionally, analysis constitutive used soils performed, elastic-plastic model Mohr-...

Stone columns are a more economical and efficient method to enhance the strength of expansive soils. Using granular blanket over top ordinary stone (OSC) improves drainage distribution applied stress impending from superstructure. The present study studied effect geogrid layers in (GB) OSC numerically using 'PLAXIS 2D'. 'Mohr-Coulomb failure criterion was deliberated for column, blanket, soil, ...