Sökning: "Residual stresses."

Visar resultat 41 - 45 av 181 avhandlingar innehållade orden Residual stresses..

  1. 41. Computational weld mechanics - Increased accuracy in fatigue assessment, distortion and residual stress analysis

    Författare :Jinchao Zhu; Zuheir Barsoum; Mansoor Khurshid; Rami Mansour; Heikki Remes; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Computational weld mechanics; fatigue assessment; weld distortion; residual stress; Farkostteknik; Vehicle and Maritime Engineering;

    Sammanfattning : This thesis work is concerned with the mechanical response of welded steel structures, which are distortions, residual stresses, and fatigue. The accuracy of fatigue assessment, distortion and residual stress analysis using Computational weld mechanics (CWM) is focused. LÄS MER

  3. 42. Deformations and stresses in welded pipes : numerical and experimental investigation

    Författare :Lars Troive; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datorstödd maskinkonstruktion; Computer Aided Design;

    Sammanfattning : In this dissertation, deformations and stresses in welded pipes have been studied both numerically and experimentally. The aim of this work has been to investigate and verify finite element models for simulation of the fabrications of two types of pipe joints. LÄS MER

  4. 43. Thermal residual stresses, hardness and microstructural characterisation of functionally graded WC-Co composites

    Författare :Cecilia Larsson; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Functionally graded materials (FGMs) incorporate gradual transitions in their microstructure and/or composition with distance. The gradients provide means to favourably engineer their thermomechanical properties by changing e.g., the local modulus, yield strength, state of residual stress etc. LÄS MER

  5. 44. The Influence of Residual Stresses on Fatigue Behaviour of Medium Carbon Microalloyed Steel

    Författare :Kamellia Dalaei; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue; Seels; Shot peening; Seering arms; Relaxation;

    Sammanfattning : Subjected to the dynamic loading, truck components are exposed to fatigue loading. Hence the methods to improve the fatigue properties of the components are widely employed by manufacturers. One of the well known methods in this field is shot peening. LÄS MER

  7. 45. Near-surface residual stresses and microstructural changes after turning of a nickel-based superalloy

    Författare :Christian Schlauer; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Nickel-based superalloys are precipitation hardened alloys with complex compositions. They are used in aircraft engines and land-based gas turbines in load-bearing structural components that are exposed to high temperatures. Failure mechanisms in this environment are high and low cycle fatigue, creep, and corrosion. LÄS MER