everybody knows water as a vital material for human being. using water as a relaxation material which cause muscle smoothing and comfortable have been considered from long before. people of past centuries went to the thermal springs and immersed into them. today groups of people go to seaside for swimming in their vacation. children and adults go to pools for swimming or take a warm shower afte...

Abstract A viscoelastic material which is stretched and then held at constant elongation, normally results in decreasing stresses till the equilibrium has been reached. With a crack propagation not expected as energy of system decreasing. However, an initial damage could lead to increase mechanical load on undamaged chains during relaxation, leading degradation propagation. While experimental i...

NMR measurements on core samples saturated with brine returns valuable information on the porous structure of the rock core. Monitoring a single fluid component in a relaxation experiment reflects the pore size distribution and thus the degree of sorting of the porous rock. The basic assumptions are that the mobility of the component confined in the porous rock is of such a value that a small f...

Glass relaxation occurs in a range of temperature during transition from equilibrium to super-cooled liquid. Viscoelastic material model can be applied to simulate glass behavior in the glass transition regime. COMSOL Multiphysics software 4.3b can simulate the stress relaxation with the WLF (WilliamsLandel-Ferry) shift function, but no structural relaxation. In this study we developed a framew...

In this paper, a new viscoelastic size-depended model developed based on a modified couple stress theory and the for nonlinear viscoelastic material in order to vibration analysis of a viscoelastic nanoplate. The material of the nanoplate is assumed to obey the Leaderman nonlinear constitutive relation and the von Kármán plate theory is employed to model the system. The viscous parts of the clas...