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133 results on '"Doquet, V."'

33. Influence of as-cast spherulites on the fracture toughness of a Zr 55 Cu 30 Al 10 Ni 5 bulk metallic glass

Author

Hin, S., Bernard, C., Doquet, V., Yokoyama, Y., Magueresse, A., Keryvin, V., Institut de Recherche Dupuy de Lôme (IRDL), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and Tohoku University [Sendai]

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

38. Caractérisation et modélisation de l'alliage Ti-6Al-4V sous chargement dynamique complexe

Author

Sotto, M. Ruiz de, Longère, Patrice, Doquet, V., Papasidero, J., Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), and École polytechnique (X)-Mines Paris - PSL (École nationale supérieure des mines de Paris)

Subjects
[PHYS]Physics [physics], [PHYS.MECA]Physics [physics]/Mechanics [physics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

40. Determination of the Effect of Stress State on the Onset of Ductile Fracture Through Tension-Torsion Experiments

Author

Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Impact and Crashworthiness Laboratory, Mohr, Dirk, Papasidero, J., Doquet, V., Massachusetts Institute of Technology. Department of Mechanical Engineering, Massachusetts Institute of Technology. Impact and Crashworthiness Laboratory, Mohr, Dirk, Papasidero, J., and Doquet, V.

Abstract

A tubular tension-torsion specimen is proposed to characterize the onset of ductile fracture in bulk materials at low stress triaxialities. The specimen features a stocky gage section of reduced thickness. The specimen geometry is optimized such that the stress and strain fields within the gage section are approximately uniform prior to necking. The stress state is plane stress while the circumferential strain is approximately zero. By applying different combinations of tension and torsion, the material response can be determined for stress triaxialities ranging from zero (pure shear) to about 0.58 (transverse plane strain tension), and Lode angle parameters ranging from 0 to 1. The relative displacement and rotation of the specimen shoulders as well as the surface strain fields within the gage section are determined through stereo digital image correlation. Multi-axial fracture experiments are performed on a 36NiCrMo16 high strength steel. A finite element model is built to determine the evolution of the local stress and strain fields all the way to fracture. Furthermore, the newly-proposed Hosford-Coulomb fracture initiation model is used to describe the effect of stress state on the onset of fracture., Région Île-de-France (France) (Sésame 2006 grants), France. Agence nationale de la recherche (Grant ANR-11-BS09-0008, LOTERIE)

Published
2016

44. Micromechanical study of abnormal fatigue cracking of Ti6246 at high Kmax

Author

Mignot, F., Doquet, V., Baudoux, C., Petit, J., Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), and A.F. Blom

Subjects
[SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]
Abstract

During cyclic tests performed with a constant Kmax and increasing Kmjn on a α/β titanium alloy, if Kmax is higher than 60-70% of Klc the crack growth rate does not drop, as normally expected, but reaches an asymptotic value. Solute hydrogen is shown to segregate at the crack tip when the cyclic plastic zone vanishes and to enhance room temperature creep, strain localisation and decohesion along α/β interfaces.

Published
2002

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