R
Rafael Estevez
Researcher at University of Grenoble
Publications - 67
Citations - 1435
Rafael Estevez is an academic researcher from University of Grenoble. The author has contributed to research in topics: Crazing & Fracture mechanics. The author has an hindex of 17, co-authored 61 publications receiving 1134 citations. Previous affiliations of Rafael Estevez include Centre national de la recherche scientifique & University of Lyon.
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Modeling of the competition between shear yielding and crazing in glassy polymers
TL;DR: In this article, the authors investigate the competition between shear yielding and crazing in amorphous glassy polymers and its effect on the material's fracture toughness, showing that the critical width of a craze appears to be a key feature in the toughness of glassy materials.
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Structural optimization under overhang constraints imposed by additive manufacturing technologies
TL;DR: This article proposes a new mechanical constraint functional, which mimics the layer by layer construction process featured by additive manufacturing technologies, and thereby appeals to the physical origin of the difficulties caused by overhangs.
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Material interface effects on the topology optimizationof multi-phase structures using a level set method
Natasha Vermaak,Georgios Michailidis,Guillaume Parry,Rafael Estevez,Grégoire Allaire,Yves Bréchet +5 more
TL;DR: A level set method is used as a framework to study the effects of including material interface properties in the optimization of multi-phase elastic and thermoelastic structures and highlights the design performance changes attributed to the presence of the continuously graded material interfaces.
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Shape and topology optimization considering anisotropic features induced by additive manufacturing processes
TL;DR: This article proposes a model for the anisotropic material properties of shapes depending on the (user-defined) trajectory followed by the machine tool during the assembly of each of their 2d layers.
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Sulfide stress corrosion study of a super martensitic stainless steel in H 2 S sour environments: Metallic sulfides formation and hydrogen embrittlement
Martin Monnot,Martin Monnot,Ricardo P. Nogueira,Virginie Roche,Virginie Roche,G. Berthomé,G. Berthomé,Eric Chauveau,Rafael Estevez,Rafael Estevez,Marc Mantel,Marc Mantel +11 more
TL;DR: The martensitic stainless steel EN 1.4418 grade exhibits a clear protective passive behavior with no sulfide stress corrosion cracking when exposed to sour environments of pH ≥ 4, but undergoes a steep decrease in its corrosion resistance at lower pH conditions.