Mechanical anomalies damping peaks sharper than Debye peaks, in contrast to a broad relaxation peak were observed in tetragonal barium titanate ceramic via broadband viscoelastic spectroscopy at low frequencies 10 Hz at ambient temperature after aging at 90 °C for 15 h. The sharp peaks disappear after aging above the Curie point 150 °C for 10 h . Mechanical anomalies are tentatively attributed ...

one of the most important factors that affect tire friction is surface roughness, which determines the size of the real contact area, real pressure distribution on the contact interface, and scales of mechanical engagement between viscoelastic rubber and a rough substrate. the need to predict coefficient of friction (cof) for rubber on rough surfaces for applications such as traction of tires o...

A material's mechanical properties greatly control cell behavior at the cell–substrate interface. In this work, we demonstrate that microgel multilayers have unique elastic and viscoelastic-like properties that can be modulated to produce morphological changes in fibroblasts cultured on the film. Protein adsorption is also examined and the data are contrasted with the number of cells adhered. T...

This study is concerned to check the validity and applicability of a five parameter viscoelastic model for harmonic wave propagating in the non-homogeneous viscoelastic rods of varying density. The constitutive relation for five parameter model is first developed and validity of these relations is checked. The non-homogeneous viscoelastic rods are assumed to be initially unstressed and at rest....

The purpose of this paper is to analysis the viscoelastic models under dynamic loading. A five-parameter model is chosen for study exhibits elastic, viscous, and retarded elastic response to shearing stress. The viscoelastic specimen is chosen which closely approximates the actual behavior of a polymer. The module of elasticity and viscosity coefficients are assumed to be space dependent i.e. f...

This paper addresses two important phenomena associated with interpretation of experimental viscoelastic material property data and of direct application to composites. (1) The influences of distinct ramp loading functions and of the rise time to full load on experimental material characterizations are investigated analytically and through numerical simulations and their important contributions...

Extracellular polymeric substances (EPSs) can be defined as renewable, high molecular weight materials produced by bacteria and microorganisms. EPSs are composed of primarily polysaccharides, proteins with minor amounts nucleic acids, lipids, humic substances. Cyanobacterial have a significant physiological effect on bloom formation stress tolerance in adverse conditions. Therefore, cyanobacter...

Conventional seismic rehabilitation methods may not be suitable for some buildings owing to their high cost and time-consuming foundation work. In recent years, viscoelastic dampers (VEDs) have been widely used in many mid- and high-rise buildings. This study introduces a viscoelastic passive control system called rotary rubber braced damper (RRBD). The RRBD is an economical, lightweight, and e...

<p style='text-indent:20px;'>It is well-known that viscoelasticity a material property exhibits both viscous and elastic characteristics with deformation. In particular, an fluid strains when it stretched quickly returns to its original state once the stress removed. this review, we first introduce some mathematical results, which exhibit stabilizing effect of elasticity on motion viscoel...