Publication detail
Damage of multilayer polymer materials under creep loading
ZOUHAR, M. HUTAŘ, P. NÁHLÍK, L. KNÉSL, Z.
Czech title
Poškození vícevrstvých polymerních materiálů při creepovém zatěžování
English title
Damage of multilayer polymer materials under creep loading
Type
journal article - other
Language
en
Original 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.
Czech abstract
V příspěvku je studován růst trhliny přes materiálovém rozhranní. Primární pozornost je věnována růstu trhliny s vrcholem na materiálovém rozhraní vystavené creepovému zatěžování. Díky skokové změně materiálových vlastností nemůže být použito přístupů standartní lomové mechaniky a využívá se modifikovaného přístupu založené na koncepci zobecněného součinitele intenzity napětí.
English 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.
Keywords in Czech
CMOD, materiálové rozhranní, creep, lomová mechanika
Keywords in English
CMOD, material interface, creep, fracture mechanics
RIV year
2011
Released
05.01.2011
ISSN
1013-9826
Journal
Key Engineering Materials
Volume
2011
Number
465
Pages from–to
153–156
Pages count
4
BIBTEX
@article{BUT49978,
author="Michal {Zouhar} and Pavel {Hutař} and Luboš {Náhlík} and Zdeněk {Knésl},
title="Damage of multilayer polymer materials under creep loading",
journal="Key Engineering Materials",
year="2011",
volume="2011",
number="465",
month="January",
pages="153--156",
issn="1013-9826"
}