Damage of multilayer polymer materials under creep loading

Článek recenzovaný mimo WoS a Scopus

en

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.

CMOD, material interface, creep, fracture mechanics

2011-01-05

1013-9826

Key Engineering Materials (print)

2011

465

153–156

4