Sökning: "förspänning"

Visar resultat 1 - 5 av 26 uppsatser innehållade ordet förspänning.

  1. 1. Impact of Residual Stress on the Warm Pre-Stressing Effect

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Emil Danielsson; [2023]
    Nyckelord :Warm Pre-Stressing effect; Residual stress; Cleavage fracture; Ferritic Steel; Fracture mechanics; Varm förspänning; Restspänningar; Klyvbrott; Brottmekanik; Ferritiskt stål;

    Sammanfattning : Irradiation of a reactor pressure vessel (RPV) causes a shift of the ductile to brittle transition region towards higher temperature regions. In the event of a pressurized thermal shock (PTS), where the temperature drops drastically, the ductile to brittle transition region might be entered for irradiated ferritic steel. LÄS MER

  3. 2. Numerical analysis of a bearing strength in delaminated composite joint

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

    Författare :Olavi Kukkonen; [2023]
    Nyckelord :Bearing strength; Single-lap shear; Delamination; Countersinking; Hole size;

    Sammanfattning : Composite structures are commonly joined using adhesive or mechanical joints, withmechanical joints being preferred when components need to be removable for maintenancepurposes. However, the presence of mechanical joints introduces a discontinuity in theload path, which can serve as an initiation point for failure and needs to be taken intoaccount in the design of the joint. LÄS MER

  4. 3. Instabilitetsfenomen i underspända limträbalkar

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Albin Broman; Björn Schweder; [2023]
    Nyckelord :Underspända takstolar; Instabilitet; Finita elementmetoden; Balk; Limträ; Technology and Engineering;

    Sammanfattning : Syftet med detta arbete var att undersöka olika parametrars betydelse för instabilitetsfenomen i ett underspänt balksystem av limträ. Arbetet syftade även till att undersöka den komplexitet av modellering som krävs för att nå tillräcklig noggrannhet med avseende på instabilitet. LÄS MER

  5. 4. Classification of ultrasonic signals using machine learning to identify optimal frequency for elongation control : Threaded fastening tools

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Mazen Bahy; [2022]
    Nyckelord :Machine Learning; Convolutions Neural Network CNN ; Barker signals; Ultrasonic sensors; Clamp-force; Threaded fastening assembly; Maskininlärning; konvolutionellt neuralt nätverk; Barker-signaler; Ultraljudssensorer; klämkraft; Åtdragningsmontering;

    Sammanfattning : Studying the preload in a screw joint has been the focus of today’s industry. The manufacturer reflects that demand by investigating different opportunities and techniques to develop this area. There are four different ways of controlling the tightening of bolts and joints to achieve the required clamp force that can hold for a specific preload. LÄS MER

  7. 5. Development of Foot Design for Gasketed Plate Heat Exchangers

    Master-uppsats, Lunds universitet/Innovation

    Författare :Daniel Rundström; [2022]
    Nyckelord :Heat exchanger; bolted joints; product development; FEM.; Technology and Engineering;

    Sammanfattning : In the process of making the industry more energy efficient, the gasketed plate heat exchanger has an important role as it effectively transfers heat between fluids. This master thesis aims to investigate and develop a new supportive foot for Alfa Laval’s gasketed plate heat exchangers. LÄS MER