The 'pure-shear' fracture test for viscoelastic elastomers and its revelation on Griffith fracture
| Autor: | Bhavesh Shrimali, Oscar Lopez-Pamies |
|---|---|
| Rok vydání: | 2023 |
| Předmět: |
Condensed Matter - Materials Science
Mechanics of Materials Mechanical Engineering Soft Condensed Matter (cond-mat.soft) Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Chemical Engineering (miscellaneous) Bioengineering Condensed Matter - Soft Condensed Matter Engineering (miscellaneous) |
| Zdroj: | Extreme Mechanics Letters. 58:101944 |
| ISSN: | 2352-4316 |
| DOI: | 10.1016/j.eml.2022.101944 |
| Popis: | Strikingly, "pure-shear" fracture tests have repeatedly shown that fracture nucleation in (common hydrocarbon and other types of) viscoelastic elastomers occurs at a critical stretch that is independent of the stretch rate at which the test is carried out. In this Letter, we demonstrate that this remarkable -- yet overlooked -- experimental finding implies that the Griffith criticality condition that governs nucleation of fracture from large pre-existing cracks in viscoelastic elastomers can be written in fact as an expression not in terms of an elusive loading-history-dependent critical tearing energy Tc, as ordinarily done, but as one exclusively in terms of the intrinsic fracture energy Gc of the elastomer. |
| Databáze: | OpenAIRE |
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