Now showing items 1-7 of 7

  • Comparison of Different Load Spectra on Residual Fatigue Lifetime of Railway Axle 

    Pokorný, Pavel; Náhlík, Luboš; Hutař, Pavel (Elsevier, 2014-06-18)
    The railway axles are subjected to variable amplitude loading. The variability is caused by many different regimes of train operation. The dominant load is caused by the weight of the vehicle, which generates rotary bending ...
  • Crack propagation in the vicinity of the interface in layered materials 

    Malíková, Lucie; Náhlík, Luboš; Hutař, Pavel; Knésl, Zdeněk (University of West Bohemia, 2009-01-04)
    Paper deals with the problem of crack propagation in the vicinity of the interface in layered materials. Layered materials are often used in practice, primarily because of their better mechanical properties in comparison ...
  • Critical applied stresses for a crack initiation from a sharp V-notch 

    Náhlík, Luboš; Hutař, Pavel; Štegnerová, Kateřina (Gruppo Italiano Frattura, 2014-10-31)
    The aim of the paper is to estimate a value of the critical applied stress for a crack initiation from a sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because ...
  • The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front 

    Oplt, Tomáš; Pokorný, Pavel; Náhlík, Luboš; Hutař, Pavel (De Gruyter Open, 2017-11-22)
    Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used ...
  • Estimation of stepwise crack propagation in ceramic laminates with strong interfaces 

    Náhlík, Luboš; Štegnerová, Kateřina; Hutař, Pavel (Gruppo Italiano Frattura, 2015-10-01)
    The contribution deals with a description of the specific crack behaviour in the layered alumina-zirconia ceramic laminate. The main aim is to clarify crack behaviour in the compressive layer and provide computational tools ...
  • Fracture mechanics parameters of multilayer pipes 

    Malíková, Lucie; Náhlík, Luboš; Hutař, Pavel; Knésl, Zdeněk (University of West Bohemia, 2007-10-19)
    Multilayer pipes consisting of different materials are frequently used in praxis because of partial improvement of the properties of pipe systems. To estimate lifetime of these pipes the basic fracture parameters have to ...
  • Influence of Threshold Values on Residual Fatigue Lifetime of Railway Axles under Variable Amplitude Loading 

    Pokorný, Pavel; Náhlík, Luboš; Hutař, Pavel (Elsevier, 2015-03-20)
    The paper deals with an estimation of residual fatigue lifetime of railway axles under real loading spectrum. The residual fatigue lifetime is given by magnitude of fatigue crack propagation rate. This rate depends ...