Sökning: "ultrasonic inspection"
Visar resultat 1 - 5 av 13 avhandlingar innehållade orden ultrasonic inspection.
1. Non-destructive measurement of near-surface cracks in railheads : with focus on ultrasonic inspections
Sammanfattning : Near-surface cracks in railhead that caused by rolling contact fatigue (RCF) is one of a kind rail defects that degrade rail track quality. Dependent on the trail load, the cracks can reach to severe level quickly. LÄS MER
2. Nonlinear Interaction Between Ultrasonic Waves and Cracks and Interfaces
Sammanfattning : 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. LÄS MER
3. 2D hybrid modeling of defects in an ultrasonic inspection situation
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
4. Condition monitoring of process equipment made from plastic materials
Sammanfattning : .... LÄS MER
5. Ultrasonic testing of components produced with additive manufacturing : Towards improved detection and classification of defects
Sammanfattning : The focus in this work is on the use of ultrasonic testing as a method for inspecting components manufactured through additive manufacturing (AM) processes. The research is rooted in the need for effective non-destructive testingtechniques that can adapt to the unique challenges posed by AM-produced materials, including complex defect geometries and surface conditions. LÄS MER