Rafael Estevez
University of Grenoble
67 Papers
201 Citations
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. Previous affiliations of Rafael Estevez include Centre national de la recherche scientifique & University of Lyon.
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Papers
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.
201
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.
193
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.
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.
91
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.
90