Šíření trhliny přes rozhranní dvou polymerních materiálů

Crack propagation through the interface between two polymer materials

článek ve sborníku ve WoS nebo Scopus

en

The existence of step change of the material properties influences stress distribution near the crack tip and also influences crack propagation through the interface. This work is focused on stability conditions of the crack perpendicular to the interface between two polymer materials and discusses estimation of the critical distance d used in stability criteria for crack touching the interface. The stability condition of the crack penetrating through the interface between two polymer materials was studied and numerically investigated. The resultant values of critical load were determined by stability criterion based on strain energy density factor for different elastic mismatch of the materials considered and for different values of critical distance d. The results of this study can lead to better lifetime prediction and safer design of layered structures.

Práce se zabývá vlivem skokové změny materiálových vlastností na pole napětí v okolí kořene trhliny u trhliny kolmé a s vrcholem na materiálovém rozhranní. Je zde diskutována volba a velikost parametru d, který se objevuje v kritériích stability a na základě kritéria stability založené na faktoru hustoty deformační energie je vypočítána hodnota kritického tlaku nutného pro šíření trhliny z materiálového rozhranní.

The existence of step change of the material properties influences stress distribution near the crack tip and also influences crack propagation through the interface. This work is focused on stability conditions of the crack perpendicular to the interface between two polymer materials and discusses estimation of the critical distance d used in stability criteria for crack touching the interface. The stability condition of the crack penetrating through the interface between two polymer materials was studied and numerically investigated. The resultant values of critical load were determined by stability criterion based on strain energy density factor for different elastic mismatch of the materials considered and for different values of critical distance d. The results of this study can lead to better lifetime prediction and safer design of layered structures.

kritéria stability, trhlina, rozhranní, MKP

stability criteria, crack, material interface, FEM

2010

08.11.2010

University of West Bohemia

University of West Bohemia, Plzeň

978-80-7043-919-7

Applied and Computational Mechanics - Extended Abstracts

1–2

2