Search for dissertations about: "rough crack"
Showing result 1 - 5 of 13 swedish dissertations containing the words rough crack.
-
1. Elastic wave scattering by rough crack in an anisotropic solid
Abstract : .... READ MORE
-
2. Rough Scatterers in Acoustics and Elastodynamics
Abstract : The purpose of this thesis is to investigate the influence of roughness on wave scattering from finite-sized surfaces, in particular elastic wave scattering from cracks. Acoustic scattering from a sphere is considered using the null field approach. READ MORE
-
3. Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces
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
-
4. Failure of thermal barrier coatings under thermal and mechanical fatigue loading : microstructural observations and modelling aspects
Abstract : Industrial and air-borne gas turbine hot components suffer from creep, oxidation, corrosion and microstructural degradation if not shielded from the hot and aggressive combustion gases. Two major strategies commercially available are adopted; film cooling by pressurised air and application of protective coatings. READ MORE
-
5. 3D-printing for Aerospace : Fatigue Behaviour of Additively Manufactured Titanium
Abstract : Laser powder bed fusion (L-PBF) and electron beam powder bed fusion (E-PBF) are two of the most common additive manufacturing (AM) methods which both provide the engineer with a great freedom of design.This means that parts with light weight, multifunctional applications and improved performance could be achieved through innovative design solutions which have attracted a lot of interest from the aerospace industry. READ MORE