In this contribution a model to investigate the structural response of pipelines in view of strain based design is developed. The approach is based on analytical modeling and verified with finite element solutions. The model is derived at first for isotropic structural behavior. Several load cases, namely pressure containment and combined loads are then evaluated with specific strain based requirements and their corresponding stress states. As a result the influence of Y/T ratio and hardening exponent on the structural behavior can be confirmed numerically. Finally, the model is extended to anisotropic structural behavior. With this extension pressure-strain diagrams from numerical and experimental hydro tests show an enhanced correlation to each other.

Volume Subject Area:
Strain-Based Design
Keywords:
plastic deformations, strain based design, limit state, combined loads, multi-axial stresses, Hollomon power law, anisotropy, von Mises criterion, Hill criterion, finite element simulation
Topics:
Anisotropy, Computer simulation, Deformation, Design, Finite element analysis, Pipes, Stress, Pressure, Containment, Hardening, Modeling, Pipelines, Simulation
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Copyright © 2010
 by ASME
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