4.7 Article

Scattering of elastic waves by a sphere with orthorhombic anisotropy and application to polycrystalline material characterization

Related references

Note: Only part of the references are listed.
Article Acoustics

Scattering of elastic waves by a transversely isotropic sphere and ultrasonic attenuation in hexagonal polycrystalline materials

Ata Jafarzadeh et al.

Summary: This study investigates the scattering of elastic waves by a transversely isotropic sphere in an isotropic medium. The elastodynamic equations inside the sphere are transformed to spherical coordinates and the displacement field is expanded using vector spherical harmonics and powers. Recurrence relations are derived from the governing equations, and the remaining expansion coefficients are determined using boundary conditions. The calculated transition (T) matrix elements explicitly represent the effective complex wave number of transversely isotropic materials for low frequencies, without limitations on the degree of anisotropy.

WAVE MOTION (2022)

Article Acoustics

Transverse-to-transverse diffuse ultrasonic double scattering

Yuantian Huang et al.

Summary: A new transverse-to-transverse double scattering model (T-T DSR) is proposed in this work to more accurately model transverse ultrasonic backscatter, utilizing a quasi-Monte Carlo method and GPU acceleration for numerical computations. Experimental results demonstrate that the T-T DSR model outperforms the T-T SSR model in evaluating grain size of strongly scattering specimens.

ULTRASONICS (2021)

Article Acoustics

Inversion methodology for ultrasonic characterization of polycrystals with clusters of preferentially oriented grains

S. I. Rokhlin et al.

Summary: An inverse ultrasonic methodology is proposed to quantify mean parameters of microtexture regions (MTRs) with ellipsoidal shapes. All necessary averaged MTR characteristics are obtained solely from directional ultrasonic measurements without prior knowledge of material microstructures or elastic properties of different material phases. The inversion method is illustrated by simulations and compared with destructive electron backscatter diffraction analysis, showing good agreement.

ULTRASONICS (2021)

Article Acoustics

Multi-parameter optimization of attenuation data for characterizing grain size distributions and application to bimodal microstructures

Adrien Renaud et al.

Summary: In this study, the effect of grain size heterogeneity on ultrasonic attenuation in polycrystals is analyzed. New analytical developments for extending existing theories to general grain size distributions are presented, showing that attenuation coefficients can be decomposed additively. The study is then specialized to bimodal grain size distributions and an optimization procedure is derived for characterizing these distributions.

ULTRASONICS (2021)

Article Acoustics

Maximizing the accuracy of finite element simulation of elastic wave propagation in polycrystals

M. Huang et al.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA (2020)

Article Acoustics

Numerical and analytic modelling of elastodynamic scattering within polycrystalline materials

A. Van Pamel et al.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA (2018)

Article Mathematics, Applied

SCATTERING OF IN-PLANE ELASTICWAVES BYAN ANISOTROPIC CIRCLE

Anders Bostrom

QUARTERLY JOURNAL OF MECHANICS AND APPLIED MATHEMATICS (2018)

Article Physics, Applied

Elastic constants of polycrystals with generally anisotropic crystals

Christopher M. Kube et al.

JOURNAL OF APPLIED PHYSICS (2016)

Article Nanoscience & Nanotechnology

Elastic anisotropy of crystals

Christopher M. Kube

AIP ADVANCES (2016)

Article Acoustics

Acoustic attenuation coefficients for polycrystalline materials containing crystallites of any symmetry class

Christopher M. Kube et al.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA (2015)

Article Acoustics

Finite element modelling of elastic wave scattering within a polycrystalline material in two and three dimensions

Anton Van Pamel et al.

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA (2015)

Article Acoustics

Scattering by an anisotropic circle

Anders Bostrom

WAVE MOTION (2015)

Article Acoustics

Ultrasonic attenuation in polycrystals using a self-consistent approach

Christopher M. Kube et al.

WAVE MOTION (2015)

Article Physics, Multidisciplinary

Universal elastic anisotropy index

Shivakumar I. Ranganathan et al.

PHYSICAL REVIEW LETTERS (2008)