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Magic Angles in Fracture Surface Morphologies of Gelatin Hydrogels

Abstract : The full 2D analysis of roughness profiles of fracture surfaces resulting from quasi-static crack propagation in gelatin gels reveals an original behavior characterized by (i) strong anisotropy with maximum roughness at $V$-independent symmetry-preserving angles (ii) For crack velocities $V$ below a critical value, a cross-hatched regime due to straight macrosteps drifting at the same magic angles (iii) A marked increase with $V$ of average roughness amplitude. This, together with previous results on other highly compliant, tough, polymeric networks, leads us to propose the existence of a new class of morphologies, controlled primarily by elastic non-linearities.
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Contributor : Olivier Ronsin Connect in order to contact the contributor
Submitted on : Wednesday, January 9, 2008 - 5:24:47 PM
Last modification on : Saturday, January 15, 2022 - 3:44:24 AM
Long-term archiving on: : Tuesday, April 13, 2010 - 4:51:51 PM


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  • HAL Id : hal-00203366, version 1
  • ARXIV : 0801.1557


Tristan Baumberger, Christiane Caroli, David Martina, Olivier Ronsin. Magic Angles in Fracture Surface Morphologies of Gelatin Hydrogels. 2008. ⟨hal-00203366⟩



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