Damage of Multilayer Polymer Materials under Creep Loading

Abstract:

Failure of layered materials is frequently caused by the existence of interfaces between single layers. In structures loaded by long-term constant stress the damage can be described on micro-scale by material changes due to active creep mechanism and at the macro-level by a corresponding change of the stress and strain field. In the contribution the behavior of a crack propagating through the interface is analyzed. Primary attention is devoted to a crack with its tip at the interface under creep exposition. The step change of material properties at the bi-material interface means that standard fracture mechanics access is not applicable and a modified approach based on generalization of the classical concept has to be used. The approach is illustrated on the damage of a plastic pipe with protective layer.

• Periodical: Key Engineering Materials (Volume 465)
• Pages: 153-156
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.465.153
• Online since: January 2011
• Authors: Michal Zouhar, Pavel Hutař, Luboš Náhlík, Zdeněk Knésl
• Keywords: CMOD, Creep, Fracture Mechanic, Material Interface

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