Estimation of the stress state of polymeric pipe structures with hollow (cellular) structure of the wall

We propose a method for the estimation of the stress-strain state of cylindrical large-size structures with hollow (cellular) structures of the wall. Structures of this type are modeled by cylindrical orthotropic shells for which the cylindrical and tensile stiffnesses are theoretically found. The relations for the estimation of the stress state in hollow walls of cellular structures are proposed. We study the stress-strain state of cellular reservoirs vertically placed in soil and develop recommendations for their design.
UDC 539.3 Introduction At the present, polymers and, especially, polyethylene prove to the most extensively used materials for the production of industrial low-pressure pipelines (8), (17). Pipelines fabricated of these [...]