Sökning: "Elastic anisotropy"

Visar resultat 1 - 5 av 60 avhandlingar innehållade orden Elastic anisotropy.

  1. 1. Elastic Wave Propagation in Anisotropic Media. Application to Ultrasonic NDT

    Författare :A. Jonas Niklasson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; layered media; cylinders; cracks; integral equations; scattering; nondestructive testing; elastic waves; ultrasonics; transducers; anisotropy;

    Sammanfattning : The subject of this thesis is elastic wave propagation in anisotropic materials with application to ultrasonic nondestructive testing (NDT). The first part of the thesis is concerned with modeling of ultrasonic transducers and wave propagation in anisotropic materials in general. First, a scalar 2-D case is considered. LÄS MER

  3. 2. Scattering of elastic waves by an anisotropic sphere

    Författare :Ata Jafarzadeh; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sphere; T matrix; Effective wave number; Distribution of inclusions; Phase velocity.; Anisotropy; Attenuation; Scattering;

    Sammanfattning : Scattering of a plane wave by a single spherical obstacle is the archetype of many scattering problems in physics and geophysics. Spherical objects can provide a good approximation for many real objects, and the analytic formulation for a single sphere can be used to investigate wave propagation in more complicated structures like particle composites or grainy materials, which may have application in non-destructive testing, material characterization, medical ultrasound, etc. LÄS MER

  4. 3. Elastic wave scattering from corrugated surfaces in anisotropic media

    Författare :Tatiana Krasnova; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; corrugated surface; perturbation approach; scattering; anisotropy; ultrasonic waves; null field approach; integral equation; Green s function;

    Sammanfattning : .... LÄS MER

  5. 4. Modeling of Scattering by Cracks in Anisotropic Solids - Application to Ultrasonic Detection

    Författare :Johan Mattsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; elastic wave; ultrasonics; crack; integral equations; transducer; anisotropy; scattering; nondestructive testing;

    Sammanfattning : Elastodynamic wave scattering in anisotropic solids with application to ultrasonic nondestructive testing (NDT) is treated and mathematically modeled in this thesis. The scatterers are infinite strip-like cracks and the solids are homogeneous and linearly elastic with negligible damping. LÄS MER

  7. 5. Elastic wave scattering by rough crack in an anisotropic solid

    Författare :Tatiana Krasnova; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pertubation approach; anisotropy; rough crack; scattering; integral equation;

    Sammanfattning : .... LÄS MER