Abstract
Two different approaches for modelling the mechanical behaviour of polyethylene materials are presented. In the first one, the emphasis is on the relationships between molecular features and mechanical properties. In the proposed model, the material is analyzed from a microscopic viewpoint and considered as an aggregate of crystals. The constitutive equation is expressed in a viscoplastic framework considering degradation at large deformations. For the second approach, the material response is considered to be nonlinear viscoelastic. A phenomenological approach is adopted, and attention is given on the formulation of a model that can be implemented for structural analysis of components such as pipes. In this part of the study, numerical and experimental data of creep for a medium-density polyethylene pipe material are presented. The efficacy of the micro- and macro-mechanical approaches is confirmed by experimental results.
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Alvarado-Contreras, J.A., Liu, H., Polak, M., Penlidis, A. (2006). Micro- And Macro-Mechanical Approaches for Modelling of Polyethylene Material for Pipes. In: Pandey, M., Xie, WC., Xu, L. (eds) Advances in Engineering Structures, Mechanics & Construction. Solid Mechanics and Its Applications, vol 140. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4891-2_37
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DOI: https://doi.org/10.1007/1-4020-4891-2_37
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