Search for dissertations about: "ultrasonic nondestructive testing"

Showing result 11 - 14 of 14 swedish dissertations containing the words ultrasonic nondestructive testing.

  2. 11. Laboratory Seismic Testing of Asphalt Concrete

    Author : Anders Gudmarsson; Nils Rydén; Björn Birgisson; Hervé Di Bendetto; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Nondestructive laboratory seismic testing to characterize the complex modulus and Poisson’s ratio of asphalt concrete is presented in this thesis. These material properties are directly related to pavement quality and the dynamic Young’s modulus is used in thickness design of pavements. READ MORE

  4. 12. Experimental Validation of a Phased Array Ultrasonic Testing Probe Model and Sound Field Optimization

    Author : Xiangyu Lei; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phased array; Sound field optimization; Experiments; Validation;

    Abstract : New manufacturing technologies are developed to facilitate flexible product designs and production processes. However, the quality of the final products should not be compromised, especially for safety prioritized industries, e.g. aerospace industry. READ MORE

  5. 13. Scattering of Elastic Waves from Inhomogeneities in Solids - Application to Ultrasonic NDT

    Author : Tomas Grahn; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The subject of this thesis is scattering of elastic waves from inhomogeneities in solids, with applications to ultrasonic nondestructive testing (NDT). The major part of the work concerns cracks in anisotropic solids, but the interaction of Lamb waves with circular holes in plates is considered as well. READ MORE

  6. 14. Guided Elastic Waves along Periodically Corrugated Structures

    Author : Ahmed M. A. El-Bahrawy; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The present thesis consider time-harmonic surface and guided elastic waves propagating along periodically corrugated structures. The problems discussed deal with various configurations where the surfaces are sinusoidally - singly or doubly - periodic, and the interest is focused on investigating the roots of the dispersion relations and in particular the stopband and cross-over resonances. READ MORE