Search for dissertations about: "ultrasonic probe model"

Showing result 1 - 5 of 12 swedish dissertations containing the words ultrasonic probe model.

  2. 1. Optimal Estimation of Grain Orientation in an Anisotropic Weld by Ultrasonic Techniques

    Author : Qingwei Liu; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; anisotropic weld model; multi-objective genetic algorithm; nonlinear optimization; ultrasonic probe model; 2D ray tracing;

    Abstract : Grain orientation in an anisotropic weld highly influences ultrasound paths and thus is a significant parameter when making simulations of ultrasonic testing of anisotropic welds. Though each weld is thought to be unique in its structure, the common procedure in modeling is to prescribe the grain orientation in a weld based on limited experience. READ MORE

  4. 2. A 2D Ray Tracing Model of Ultrasonic Wave Propagation in an Anisotropic Weld

    Author : Qingwei Liu; Chalmers tekniska högskola; []
    Keywords : probe model; ray tracing; anisotropic weld; wave propagation; FEM;

    Abstract : .... READ MORE

  5. 3. Experimental Validation and Applications of a Phased Array Ultrasonic Testing Probe Model

    Author : Xiangyu Lei; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Simulations; Applications; Nondestructive testing NDT ; Phased array ultrasonic testing PAUT ; Experiments;

    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. The assessment of product quality and integrity lies on various inspection methods. READ MORE

  6. 4. 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

  7. 5. Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces

    Author : Milan Poznic; Leif Kari; Bruce Drinkwater; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ultrasonic waves; crack; modulation; rough interface; partially closed; surface-breaking; fluid-filled; Acoustics; Akustik;

    Abstract : The subject of this thesis is the development of new ultrasound inspection techniques for detection of cracks that are smaller than the wavelength of the inspecting wave and the characterization of cracks in fluid-filled pipes as either surface-breaking or subsurface. The spectrum of the scattered field of a partially closed crack comprises harmonic components not expected to be found in the case of linear scatterers such as pores or inclusions. READ MORE