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"
}