A self-affine geometrical model of dynamic RT-PMMA fractures: implications for fracture energy measurements
dc.contributor.author
hal.structure.identifier | SCHMITTBUHL, Jean
|
dc.contributor.author
hal.structure.identifier | NOEL, Olivier
|
dc.contributor.author | FOND, Christophe |
dc.contributor.author
hal.structure.identifier | KOPP, Jean-Benoit
|
dc.date.accessioned | 2015 |
dc.date.available | 2016 |
dc.date.issued | 2015 |
dc.date.submitted | 2015 |
dc.identifier.issn | 0376-9429 |
dc.identifier.uri | http://hdl.handle.net/10985/9600 |
dc.description.abstract | Profilometric imaging of fracture surfaces of rubber toughened polymer has been performed at two different resolutions (a) at large scales [10 μ\upmu m–25 mm] using an opto-mechanical profilometer and (b) at small scales [0.195 μ\upmu m–0.48 mm] using an interferometric optical microscope. We introduced a self-affine geometrical model using two parameters: the Hurst exponent and the topothesy. We showed that for rubber toughened materials the approximation of the created surface by a mean flat plane leads to a poor estimation of the dynamic fracture energy GIdcG_{Idc}. The description of the created rough fracture surface by a self-affine model is shown to provide a significantly better approximation. A new and original geometrical method is introduced to estimate self-affine parameters: the 3D surface scaling method. Hurst exponents are shown to be unique, χ=0.6±0.1\chi =0.6\pm 0.1 for the different fracture zones and measurement scales. Topothesy ratios indicate a significant difference of fracture surface roughness amplitude depending on the observation resolution when the detrending technique is not correctly introduced. |
dc.description.sponsorship | ANR Carenco |
dc.language.iso | en |
dc.publisher | Springer Verlag |
dc.rights | Post-print |
dc.subject | Dynamic fracture |
dc.subject | Polymers |
dc.subject | Surface roughness |
dc.subject | Self-affinity |
dc.subject | Hurst exponent |
dc.subject | Topothesy |
dc.subject | Fracture energy |
dc.subject | Rapid crack propagation |
dc.title | A self-affine geometrical model of dynamic RT-PMMA fractures: implications for fracture energy measurements |
ensam.embargo.terms | 1 Year |
dc.identifier.doi | 10.1007/s10704-015-0025-2 |
dc.typdoc | Article dans une revue avec comité de lecture |
dc.localisation | Centre de Bordeaux-Talence |
dc.subject.hal | Physique: matière Condensée: Science des matériaux |
dc.subject.hal | Sciences de l'ingénieur: Matériaux |
dc.subject.hal | Sciences de l'ingénieur: Mécanique |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des matériaux |
ensam.audience | Internationale |
ensam.page | 141-152 |
ensam.journal | International Journal of Fracture |
ensam.volume | 193 |
ensam.issue | 2 |
hal.identifier | hal-01165645 |
hal.version | 1 |
hal.status | accept |
dc.identifier.eissn | 1573-2673 |