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Browsing by Subject "Plasticity model"

Now showing items 1-7 of 7

    • Finite element analysis of damage in pipeline bends 

      Swart, A. E.; Karamanos, S. A.; Scarpas, A.; Blaauwendraad, J. (2010)
      The present paper describes a numerical formulation for the analysis of damage in steel pipeline bends. In particular, the numerical implementation of Gurson plasticity model is described in the framework of a special ...

    • Finite element analysis of industrial steel elbows under strong cyclic loading 

      Varelis, G. E.; Pappa, P.; Karamanos, S. A. (2011)
      Steel elbows are used in petrochemical facilities and power plants. In the case of an earthquake event, in addition to other service loads, they are subjected to strong repeated cyclic structural loading that may lead to ...

    • Mechanics models for hydrogen embrittlement mechanisms 

      Liang, Y.; Sofronis, P.; Dodds Jr, R. H.; Aravas, N. (2005)
      Of the many suggestions of hydrogen-induced degradation of engineering materials, two mechanisms appear to be viable in non-hydride forming systems: hydrogen-enhanced localized plasticity (HELP) and hydrogeninduced decohesion. ...

    • Numerical analysis of the seismic response of sand passively stabilized against liquefaction 

      Andrianopoulos K.I., Agapoulaki G.I., Papadimitriou A.G. (2015)
      Passive stabilization is a new technique for mitigating the risk of seismic liquefaction in the non-cohesive foundation soil of existing structures. It consists of the low pressure injection (in the soil pores) of colloidal ...

    • Numerical implementation of J 2 non-associative flow plasticity models 

      Pappa, P.; Karamanos, S. A. (2009)
      The present paper describes a J2 non-associative plasticity model, which takes into account the "corner-like" effects at the loading point on the yield surface, and is suitable for shell buckling calculations. The plastic ...

    • Pipe elbows under strong cyclic loading 

      Varelis, G. E.; Karamanos, S. A.; Gresnigt, A. M. (2012)
      Motivated by the response of industrial piping under seismic loading conditions, the present study examines the behavior of steel process piping elbows, subjected to strong cyclic loading conditions. A set of experiments ...

    • Steel elbow response under strong cyclic loading 

      Varelis, G. E.; Gresnigt, A. M.; Karamanos, S. A. (2012)
      The present study examines the behavior of steel pipeline elbows subjected to strong cyclic loading conditions. A set of experiments is conducted where in-plane cyclic bending with constant amplitude is applied on the elbow ...