I am looking for references that cover the calculation of the stiffness of a pre insulated plastic pipe material.
The ring bending moment of inertia is required as is the location of the neutral axis. From this data I rpesume one can calulate the stiffnes using the various moduli of the core, insulation and outer sheath.
Neither Moser or Watkins cover this in their buried pipeline books, no standards appear to cover this apsect either.
Has anyone in the district heating field had to do this type of design where the criteria of stress, strain, deflection, combined loading and buckling are determined for external loads such as wheel loading, impact loading superimposed loads and soil loads?
The ring bending moment of inertia is required as is the location of the neutral axis. From this data I rpesume one can calulate the stiffnes using the various moduli of the core, insulation and outer sheath.
Neither Moser or Watkins cover this in their buried pipeline books, no standards appear to cover this apsect either.
Has anyone in the district heating field had to do this type of design where the criteria of stress, strain, deflection, combined loading and buckling are determined for external loads such as wheel loading, impact loading superimposed loads and soil loads?
