Sökning: "Ultrasonic Testing"

Visar resultat 11 - 15 av 57 uppsatser innehållade orden Ultrasonic Testing.

  1. 11. Capacitive Micromachined Ultrasonic Transducers for Underwater Applications

    Master-uppsats, Uppsala universitet/Institutionen för fysik och astronomi

    Författare :Patrick Johansson; [2021]
    Nyckelord :CMUT; capacitive; micromachined; ultrasonic; transducer; model;

    Sammanfattning : Capacitive micromachined ultrasonic transducers (CMUT:s) are often used in medical imaging and they show some promise as underwater transducers. This thesis collates the available information about how CMUT:s operate, their strengths and weaknesses and investigates their efficiency as an underwater transducer. LÄS MER

  3. 12. The Effect of High Wheel Impact Load on the Rail Reliability - a Case Study at Bodsjön

    Master-uppsats, KTH/Spårfordon

    Författare :Ngoc Thúy Vy Dang; [2021]
    Nyckelord :rail defects; rail reliability; Ultrasonic Test; wheel damage; Wheel Impact Load Detector; statistics; järnvägsdefekter; järnvägssäkerhet; ultraljudstest; hjulskador; hjullastningsdetektor; statistik;

    Sammanfattning : This study focuses on the reliability of railway track in the relation with high loads resulted from wheel damages, where higher (dynamic) vertical wheel loads are expected from trains with damaged wheels. The Swedish Transport Administration (Trafikverket) has monitored and recorded data of rail defects and breaks. LÄS MER

  4. 13. Estimation of the characteristic in-situ compressive strength class of concrete structures - A case study of the Skuru bridge

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Sara Ahmadiyan; Daniel Mehari; [2021]
    Nyckelord :existing; structures; characteristic; in-situ; compressive; non-destructive; semi-destructive; destructive; cores; EN13791; GCSC; TDOK; UPV; Rebound; Pull-out; Windsor; correlation; calibrate; indirect; direct; estimate; befintlig; konstruktion; karakteristisk; tryckhållfasthet; icke-destruktiv; halv-destruktiv; destruktiv; kärnor; EN13791; GCSC; TDOK; UPV; Rebound; Utdragskraft; Windsor; korrelation; kalibrera; indirekt; direkt; bedöma;

    Sammanfattning : It is inevitable that Structures become older and their intended use changes or the structuralcodes regulations change. In some regions the damage from seismic activities is a possibility.It becomes, therefore crucial to assess the structural capacity of such structures. LÄS MER

  5. 14. Life and fracture in very high cycle fatigue of a high strength steel

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Daniel Karlsson; [2021]
    Nyckelord :Very high cycle fatigue; VHCF; Fractography; Fine granular area; FGA; High strength tool steel; Ultrasonic testing equipment;

    Sammanfattning : Classical fatigue models teach that there is an intrinsic fatigue limit for steels, representing a level of stress that is too low for regular crack growth where every cyclic load propagates a fatigue crack through the material. Modern application with extreme lifetimes has shown that fatigue will still take place in steels with stress levels well below the expected fatigue limit. LÄS MER

  7. 15. Exploring Emotionally Evocative Experiences with Sound

    Kandidat-uppsats, Malmö universitet/Institutionen för konst, kultur och kommunikation (K3)

    Författare :Malin Benson; [2021]
    Nyckelord :Interaction design; emotional interaction; soundscapes;

    Sammanfattning : In our relationship with the world around us, emotions play a vital role. As technology has become increasingly integrated and influential in our daily lives and activities, the design of systems that can support the human experience is of high interest. LÄS MER