It is shown that the anelastic Oberbeck-Boussinesq system is a small Mach, small Péclet and small Froude number limit of the complete Navier-Stokes-Fourier system for gases with large specific heat at constant volume. This result is obtained on an arbitrary large time interval. The proof allows an intrinsic view into the process of separation of fast oscillating acoustic waves, governed by a Li...

This work proposes a coupled finite element model for actively controlled constrained layer damped CLD rotating plate with self-sensing technique and frequency-dependent material property in both the time and frequency domain analyses. Constrained layer damping with viscoelastic material can effectively reduce the vibration in rotating structures. However, most existing research models use comp...

OBJECTIVE This study evaluated the glass transition temperature (Tg) and degree of conversion (DC) of a light-cured (Fill Magic) versus a chemically cured (Concise) orthodontic composite. MATERIAL AND METHODS Anelastic relaxation spectroscopy was used for the first time to determine the Tg of a dental composite, while the DC was evaluated by infrared spectroscopy. The light-cured composite sp...

Surface displacement and self-attraction loading (SAL) elevation induced by ocean tides are known to be affected material properties of the solid Earth. Recent studies have shown that, in addition elasticity, anelasticity considerably impacts surface displacements due tide (OTL). We employ consistent 3D seismic elastic attenuation tomography models construct anelastic earth models, derive corre...

Dynamic mechanical relaxation is a fundamental tool to understand the and physical properties of viscoelastic materials like glasses. Mechanical spectroscopy shows that high-entropy bulk metallic glass (La30Ce30Ni10Al20Co10) exhibits distinct β-relaxation feature. In present research, dynamic analysis thermal creep were performed using this material at temperature domain around β relaxation. Th...

S U M M A R Y Lateral variations in mantle anelasticity (Q) are important for understanding the Earth’s thermal and chemical structure in the mantle. In the past decades, preliminary global 3-D tomographic Q models have been developed based upon the assumption that traveltime (phase delay) anomalies are due to the Earth’s elastic (velocity) structure whereas amplitude anomalies are dominated by...

Relative to the full compressible flow equations, sound-proof models filter acoustic waves while maintaining advection and internal waves. Two well-known sound-proof models, an anelastic model by Bannon and Durran’s pseudo-incompressible model, are shown here to be structurally very close to the full compressible flow equations. Essentially, the anelastic model is obtained by suppressing ∂tρ in...

Two families of cuprates exhibiting high-Tc superconductivity, YBa2Cu3O6+x (YBCO) and La2xSrxCuO4+δ (LSCO), have been extensively studied by anelastic spectroscopy, by measuring the complex dynamic Young’s modulus E (ω, T ) = E′ + iE′′ of ceramic samples at frequencies of 0.5-20 kHz between 1 and 900 K. Results are also presented on oxygen vacancies in the ruthenocuprate RuSr2GdCu2O8−δ. The ela...