Sökning: "Fracture strength"

Visar resultat 1 - 5 av 118 uppsatser innehållade orden Fracture strength.

  1. 1. Life extension of welded steel details in bridges

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Zhelei Jin; [2023]
    Nyckelord :Welded joints; Fatigue; Pre-fatigue; Life extension; Fracture mechanics; Finite element analysis; HFMI; ; Svetsade fogar; utmattning; förutmattning; livsförlängning; frakturmekanik; finit elementanalys; HFMI; ;

    Sammanfattning : High-Frequency Mechanical Impacts (HFMI) is a surface treatment technique utilized to introduce residual stresses and extend the service life of structures. This project primarily focuses on studying the life extension effects of HFMI on welded structures that have undergone fatigue and have existing cracks. LÄS MER

  3. 2. Bedömning av prediktiv förmåga för Finita Elementberäkningar med optisk töjningsmätning (DIC)

    Kandidat-uppsats, Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Författare :Albin Zetterqvist; Linus Hjelm; [2023]
    Nyckelord :Digital image correlation; Finite element; Predictive capability; Model calibration; FEM; DIC; Modellkalibrering;

    Sammanfattning : The goal of this thesis is to improve the predictive capability of Finite element (FE) by gathering data from experimental test and implement the characteristics into the material model that is used. FE is a commonly used method to predict the mechanical behavior of materials and components during applied forces. LÄS MER

  4. 3. Utmattning av implantat-förankrade bro-konstruktionermed ett frihängande led och två olika fixturdiametrar. En pilotstudie

    Kandidat-uppsats, Malmö universitet/Odontologiska fakulteten (OD)

    Författare :Ahmed Yassin; Mohammed Al-Haideri; [2023]
    Nyckelord :Cantilever; Dental implants; Fixed dental prosthesis; Fatigue; Fracture strength; Implant angulation; Brotthållfasthet; Dentala implantat; Fast protetik; Frihängande led; Implantatvinkling; Utmattning.;

    Sammanfattning : Purpose: The purpose of this study is to evaluate how implant-supported fixed dental prosthesis (FDP) restorations with a cantilever at abutment level resist fatigue by dynamic loading and thermocycling depending on the fixture diameters.   Material and method: The study involved two groups with three specimens in each group, based on the diameter of the fixture, 3. LÄS MER

  5. 4. Experimental Testing of EPS-foam

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Carl Göransson; Erik Arnald; [2023]
    Nyckelord :Solid Mechanics; EPS; Experimental testing; Hållfasthetslära; EPS; Experimentell testning;

    Sammanfattning : The aim of this master thesis was to investigate the mechanical properties of ExpandedPolystyrene (EPS) through experimental testing. The strain was measured on thespecimen’s surface with Digital Image Correlation (DIC), in order to investigate howthe first principal strain at fracture initiation depends on the loading of the material. LÄS MER

  7. 5. Irradiation Embrittlement on a Core Shroud from Decommissioned BWR

    Master-uppsats, KTH/Fysik

    Författare :Åsa Bjåland; [2023]
    Nyckelord :hardness; Vickers hardness test; ATT; yield strength; irradiation embrittlement; welds; hårdhet; Vickers hårdhetstest; ATT; sträckgräns; bestrålningsförsprödning; svetsar;

    Sammanfattning : Irradiation embrittlement is a problematic issue for internal structures, such as acore shroud, in a light water reactor. It is characterized by decreased ductility andtoughness, and increased yield strength and hardening due to increased dislocations. LÄS MER