We performed 2D numerical simulations to study the dynamic heap formation of coarse particles in different dry and wet conditions. Our results show that dynamics depend not only on amount liquid contained bulk, but also initial packing, i.e., arrangement grains. The cohesion model effect discs is minimal. This mostly noticed particle energy variation rather than formation. found system varies w...

We simulate static model sandpiles in two dimensions (2D) and focus on the stresses inside the pile. In this study tangential forces, e.g. friction, are neglected. We compare the simplest possible interaction model, i.e. a linear spring and a linear dashpot, with a nonlinear law based on Hertz' theory. Furthermore, we present data obtained by a simulation of frictionless polygons with twelve si...

−− Arterial viscoelasticity can be described using stress-relaxation experiments. To fit these curves, models with springs and dashpots, based on differential equations, were widely studied. However, uniaxial tests in arteries show particular shapes with an initial steep decay and a slow asymptotic relaxation. Recently, fractional order derivatives were used to conceive a new component called s...

Watts [1] in 1883 and Frahm [2] in 1909 reported on the first use of a dynamic vibration absorber. The range of industrial applications of such device is wide and includes the minimization of the rolling of ships, the damping of torsional vibration of internal combustion engines and the smoothing of vibrations in a barber cutter. The minimization of oscillations of tall buildings by means of dy...

Semi-buried structures are most commonly used at first line of defense along the border between two countries. This demands investigation of their dynamic behaviour under blast loading. Herein, a semi-buried structure with foam sandwiched walls and buttresses to reduce the effect of blast is analysed. The effect of provision of different configurations of buttresses and foam core between two la...

Recent studies indicated that lung tissue stress relaxation is well represented by a simple empirical equation involving a power law, t-beta (where t is time). Likewise, tissue impedance is well described by a model having a frequency-independent (constant) phase with impedance proportional to omega-alpha (where omega is angular frequency and alpha is a constant). These models provide superior ...

A novel multibody rocking model is developed to investigate the dynamic response of two stacked rigid blocks placed on a linear base isolation device. The used realistic statue-pedestal system subject pulse-like ground motions. analysis shows that, in general, increases safety level system. However, for large period pulses or small size blocks, isolator can amplify motion, resulting lower minim...