KOPP, Jean Benoit; GIRARDOT, Jeremie

doi:10.4236/jmmce.2021.93016

KOPP, Jean Benoit
Institut de Mécanique et d'Ingénierie [I2M]

GIRARDOT, Jeremie

Institut de Mécanique et d'Ingénierie [I2M]

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Article de revue

Ce document a été publié dans

Journal of Minerals and Materials Characterization and Engineering. 2021, vol. 9, n° 3, p. 227-244

Résumé en anglais

The influence of temperature on the resistance to rapid crack propagation of a semi-crystalline bio-based polymer was studied. The experimental results described in this study allow to initiate a first discussion on the role of viscosity and its link with the fracture behaviour and a heterogeneous microstructure such as the semi-crysalline polymer. Dynamic fracture tests on pipes were carried out. It would appear that a temperature decrease of approximately 40 ̊C relative to ambient has no significant influence on the average crack propagation velocity (≈0.6cR), fracture energy and surface roughness. On the contrary, crack propagation paths seem to vary with temperature. The difference in fracture behaviour between the amorphous and crystalline phase varies significantly as a function of temperature. The difference between the initiation resistance and the rapid propagation also varies. This difference seems to be significantly reduced by lowering the temperature. The mechanisms of cavitation damage and plastic flow are increasingly limited by the decrease in temperature (and therefore in macromolecular mobility). Crack propagation in the pipe is more extensive and therefore more critical. This is emphasised in particular by the probability of the material to be macro-branched as the temperature decreases.< Réduire

Mots clés en anglais

Dynamic Fracture

Rapid Crack Propagation

Semi-Crystalline

Pipe

Fractography

URI

https://oskar-bordeaux.fr/handle/20.500.12278/112431

DOI

http://dx.doi.org/10.4236/jmmce.2021.93016

Unités de recherche

Institut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295

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Dynamic Fracture of a Semi-Crystalline Bio-Based Polymer Pipe: Effect of Temperature

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Résumé en anglais

Mots clés en anglais

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