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Listar por autor "Karamanos, S. A."

Mostrando ítems 81-93 de 93

    • Stress concentrations in tubular gap K-joints: mechanics and fatigue design 

      Karamanos, S. A.; Romeijn, A.; Wardenier, J. (2000)
      The present paper offers a comprehensive study on stress concentrations in welded tubular steel gap K-joints and its implications on fatigue design. After presenting an extensive overview of the relevant literature, finite ...

    • Structural integrity of steel hydrocarbon pipelines with local wall distortions 

      Pournara, A. E.; Karamanos, S. A.; Papatheocharis, T.; Perdikaris, P. C. (2014)
      Local distortions on pipeline wall in the form of dents or buckles may constitute a threat for the structural integrity of the steel pipeline. In the present paper, experimental research supported by numerical simulation ...

    • Structural performance of buried steel pipelines crossing strike-slip faults 

      Vazouras, P.; Dakoulas, P.; Karamanos, S. A. (2014)
      The performance of pipelines subjected to permanent strike-slip fault movement is investigated by combining detailed numerical simulations and closed-form solutions. A closed-form solution for the force-displacement ...

    • Structural performance of steel pipe tee-junctions 

      Papatheocharis, T.; Diamanti, K.; Varelis, G. E.; Perdikaris, P. C.; Karamanos, S. A. (2014)
      The behavior of steel pipe junctions (Tees) subjected to strong loading in the presence of internal pressure is examined in the present study. The analysis is based on a set of monotonic and cyclic out-of plane bending ...

    • Structural performance of TS590 high-strength steel welded tubular joints under extreme bending loading 

      Varelis, G. E.; Karamanos, S. A.; Papatheocharis, T.; Perdikaris, P. C. (2012)
      The present work examines the behavior of welded tubular connections made of high-strength steel and subjected to extreme loading conditions focusing on their low-cycle fatigue performance and highlighting the benefits of ...

    • Ultimate bending capacity and buckling of pressurized 90 deg steel elbows 

      Karamanos, S. A.; Tsouvalas, D.; Gresnigt, A. M. (2006)
      The paper examines the nonlinear elastic-plastic response of internally pressurized 90 deg pipe elbows under in-plane and out-of-plane bending. Nonlinear shell elements from a general-purpose finite element program are ...

    • Ultimate capacity of pipe bends under bending and pressure 

      Pappa, P.; Karamanos, S. A.; Tsouvalas, D.; Houliara, S. (2008)
      The structural capacity of pressurized pipe elbows under in-plane bending is examined. The investigation is conducted through advanced finite element analysis tools. The numerical results are successfully compared with ...

    • Ultimate capacity of pressurized 90 DEG elbows under bending 

      Karamanos, S. A.; Tsouvalas, D.; Gresnigt, A. M. (2004)
      In this paper the response of internally pressurized pipe elbows under bending loads (in-plane and out-of-plane) is examined. The investigation is conducted through advanced finite element analysis tools, supported by ...

    • Ultimate capacity of welded-slip joints under axial compression 

      Tsetseni, S.; Karamanos, S. A. (2006)
      Using advanced numerical tools, which account for the cold-expansion manufacturing process, the axial capacity of welded slip pipeline joints under compressive loading is investigated. The numerical results are in good ...

    • Variational analysis of sloshing in spherical industrial vessels under earthquake loading 

      Patkas, L. A.; Karamanos, S. A. (2006)
      A variational formulation is developed for calculating liquid sloshing effects on the dynamic response of spherical containers under external dynamic excitation. The velocity potential is expressed in a series form, where ...

    • Variational solutions for externally induced sloshing in horizontal-cylindrical and spherical vessels 

      Patkas, L. A.; Karamanos, S. A. (2007)
      A mathematical model is developed for calculating linear sloshing effects in the dynamic response of horizontal-cylindrical and spherical liquid containers under external excitation, with emphasis on earthquake excitation. ...

    • Wrinkling of lined pipes under bending 

      Vasilikis, D.; Karamanos, S. A. (2012)
      The present study is motivated by the use of lined pipes in energy pipeline applications (oil, gas, etc.) where a corrosion-resistant thin-walled liner is fitted inside a carbon-steel outer pipe. The paper focuses on ...

    • Wrinkling of lined steel pipes under bending 

      Vasilikis, D.; Karamanos, S. A. (2013)
      Lined pipes are used in energy pipeline applications (oil, gas, etc.); a corrosion-resistant thin-walled liner is fitted inside a carbon-steel outer pipe. The paper focuses on wrinkling of lined pipes (sometimes also ...