Sökning: "ultrasonics"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet ultrasonics.

  1. 1. 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

  3. 2. 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

  4. 3. 2D hybrid modeling of defects in an ultrasonic inspection situation

    Författare :Maria Semenova; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrasonics; T matrix; Finite element method; Scattering; Modelling;

    Sammanfattning : Advanced methods of nondestructive evaluations (NDE) are widely used for in-service inspection in many industrial applications, e.g. nuclear and aerospace industries. In these applications the components are exposed to different degradation mechanisms (e. LÄS MER

  5. 4. On minimally invasive treatment of Dupuytren's contracture

    Författare :Joakim Strömberg; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dupuytren Contracture; Fasciotomy; Microbial Collagenase; Ultrasonics;

    Sammanfattning : .... LÄS MER

  7. 5. Modelling of ultrasonic testing for cracks near a non-planar surface

    Författare :Jonathan Westlund; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrasonics; BIEM; Elastic waves; Nondestructive testing; Crack; BEM.;

    Sammanfattning : Nondestructive testing using ultrasound has important applications in e.g. the nuclear power and aerospace industries, where it is used to inspect safety-critical parts for flaws. LÄS MER