Dynamic fracture surface energy values and branching instabilities during rapid crack propagation in rubber toughened PMMA
✍ Scribed by Christophe Fond; Robert Schirrer
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 571 KB
- Volume
- 329
- Category
- Article
- ISSN
- 1620-7742
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✦ Synopsis
An experimental device based on strip band geometry has been designed to explore the brittle behaviour of polymers during rapid crack propagation. The macroscopic crack speed is found to be quasi-constant along an entire RT-PMMA specimen, even in the case of crack branching and until arrest, if any. At the macroscopic branching velocity, the experimental fracture surface energy and the fracture surface roughness have no single values in RT-PMMA. In fact, the macroscopic fracture surface energy increases with the number of instabilities or frustrated micro-branches. 2001 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS dynamic / polymer / fracture / crack branching / surface roughness
Valeurs de l'énergie de rupture dynamique associées aux instabilités de branchement en fissuration rapide dans un polymère « choc »
Résumé.