Výsledky vyhledávání - "Léon Ratsifandrihana"

Impact of annealing treatment on the fatigue behavior of Inconel 625 produced by laser‐based powder bed fusion

Autor: Noémie Martin, Anis Hor, Etienne Copin, Philippe Lours, Léon Ratsifandrihana

Publikováno v: Fatigue and Fracture of Engineering Materials and Structures
Fatigue and Fracture of Engineering Materials and Structures, 2022, 45 (4), pp.1258-1275. ⟨10.1111/ffe.13648⟩

International audience; Laser-based powder bed fusion (LPBF) is attractive to build complex parts in spite of the low machinability of Inconel 625. The LPBF microstructures and tensile properties are well documented in literature. But fatigue propert

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ed45de3b622cb920757852069cbe93e
https://doi.org/10.1111/ffe.13648

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Prédictions numériques de la tolérance aux dommages d'impact d'une structure composite soumise à des chargements complexes

Autor: Joel Serra, Antoine Trellu, christophe bouvet, Samuel Rivallant, Léon Ratsifandrihana, Bruno Castanie

Publikováno v: 15ème Colloque National en Calcul des Structures CSMA 2022
15ème Colloque National en Calcul des Structures CSMA 2022, May 2022, Giens, France. 8 p
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15ème colloque national en calcul des structures
15ème colloque national en calcul des structures, Université Polytechnique Hauts-de-France [UPHF], May 2022, 83400 Hyères-les-Palmiers, France

International audience; Des sollicitations multiaxiales sur structures stratifiées composites impactées sont réalisées à l'aide d'un banc d'essais développé à l'Institut Clément Ader (Toulouse). Une modélisation ElémentsFinis ,le « Discre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::136a33f4282e102674bacee8b781cdd9
https://hal.science/hal-03909336/document

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Correlation between microstructure heterogeneity and multi-scale mechanical behavior of hybrid LPBF-DED Inconel 625

Autor: Noémie Martin, Anis Hor, Etienne Copin, Philippe Lours, Léon Ratsifandrihana

Publikováno v: Journal of Materials Processing Technology
Journal of Materials Processing Technology, 2022, 303, pp.117542. ⟨10.1016/j.jmatprotec.2022.117542⟩

International audience; The two additive manufacturing processes Powder Bed Fusion (LPBF) and Directed Energy Deposition (DED) have different geometrical resolutions and production flexibilities, making their hybridization attractive. LPBF microstruc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f11e2eec48c5586adc9550b1ee5bd6d1
https://imt-mines-albi.hal.science/hal-03596475

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Numerical simulations of combined size effects acting on an open-hole laminated composite plate under tension

Autor: Joel Serra, Christophe Bouvet, Prajwal Karinja Haridas, Léon Ratsifandrihana

Publikováno v: Journal of Composite Materials
Journal of Composite Materials, In press, ⟨10.1177/00219983221139791⟩

International audience; Numerical and experimental research programs have been carried out to investigate the effect of scaling on the tensile strength of notched composites. This paper presents a computational study of scaled open-hole tensile tests

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b27215ceb5ce0e1c60e7236d73b15e01
https://hal.science/hal-03897090

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Failure simulation of four point bending CFRP laminate specimen including wrinkles

Autor: Bruno Castanié, Pierre Journoud, christophe bouvet, Léon Ratsifandrihana

Publikováno v: 24th International Conference on Composite Structures Faculty of Engineering, University of Porto, Portugal
24th International Conference on Composite Structures Faculty of Engineering, University of Porto, Portugal, Jun 2021, Porto, Portugal
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International audience; The influence of manufacturing defects in laminated composites is an major field of research according to their detrimental effects on the residual strength of the structure [1]. Among the different types of defects, wrinkling

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::8c0ad92b8c97730f10c11f7167c4ed0e
https://hal.archives-ouvertes.fr/hal-03407665

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A new interface element connecting 3D finite elements with non-coincident nodes to simulate delamination in composite laminates

Autor: Antoine Trellu, Christophe Bouvet, Léon Ratsifandrihana, Samuel Rivallant

Publikováno v: Composite Structures
Composite Structures, 2020, 252, pp.112694. ⟨10.1016/j.compstruct.2020.112694⟩
Composite Structures, Elsevier, 2020, 252, pp.112694. ⟨10.1016/j.compstruct.2020.112694⟩

International audience; Composite failure phenomena remain complex and lead to over-size structures in many industries, involving long and costly experimental campaigns. Numerical approaches are a good alternative to decrease sizing costs. The Discre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1d5dbe931fca84b0eb7bf0bf1666c2c
https://oatao.univ-toulouse.fr/26734/

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Combined loadings after medium velocity impact on large CFRP laminate plates: Tests and enhanced computation/testing dialogue

Autor: Samuel Rivallant, Guillaume Pichon, Antoine Trellu, Joël Serra, Bruno Castanié, Christophe Bouvet, Léon Ratsifandrihana

Publikováno v: Composites Science and Technology
Composites Science and Technology, Elsevier, 2020, 196, pp.108194. ⟨10.1016/j.compscitech.2020.108194⟩
Composites Science and Technology, 2020, 196, pp.108194. ⟨10.1016/j.compscitech.2020.108194⟩

International audience; The development and certification of aeronautical composite structures is still largely based on the pyramid of tests. This approach is extremely costly in terms of number of tests, especially at the level of coupons. Moreover

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3ca8eb946b0870e1fd974b87350408c
https://hal.archives-ouvertes.fr/hal-02954087

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Experimental and numerical analysis of unfolding failure of L-shaped CFRP specimens

Autor: Léon Ratsifandrihana, Christophe Bouvet, Pierre Journoud, Bruno Castanié, Frédéric Laurin

Publikováno v: Composite Structures
Composite Structures, 2019, 232, 111563, p. 1-13. ⟨10.1016/j.compstruct.2019.111563⟩
Composite Structures, Elsevier, 2019, 232, 111563, p. 1-13. ⟨10.1016/j.compstruct.2019.111563⟩

International audience; Highly curved laminated parts are used at the junction between two different perpendicular panels on aircraft primary structures. Usually, these laminates fail by delamination due to a bending moment, which appears when the pa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07e32252997b29dcbe9c7fe123f44dd7
https://hal.science/hal-02382912/document

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Simulation of medium velocity impact and compression or shear after impact on large composite laminated plates

Autor: Antoine Trellu, christophe bouvet, Samuel Rivallant, Léon Ratsifandrihana, Alexandre Chardonneau

Publikováno v: JNC21 (21ème Journées Nationales sur les Composites)
JNC21 (21ème Journées Nationales sur les Composites), École Nationale Supérieure d'Arts et Métiers (ENSAM)-Bordeaux, Jul 2019, Bordeaux, France
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International audience; Composites are known to be vulnerable to out-of-plane loading such as impact. To design composite structures without performing long and costly experimental campaigns several numerical approaches have been developed. The model

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::628f6a9ef0b5b404feb2de291c38d1d1
https://hal.archives-ouvertes.fr/hal-02115951/file/JNC21_TRELLU_Article.pdf

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Etude numérique de la propagation de fissure dans un composite tissé

Autor: Pierre Journoud, christophe bouvet, Samuel Rivallant, Nicolas Dubary, Léon Ratsifandrihana

Publikováno v: 21ème Journées Nationales sur les Composites
21ème Journées Nationales sur les Composites, École Nationale Supérieure d'Arts et Métiers (ENSAM)-Bordeaux, Jul 2019, Bordeaux, Talence, France
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International audience; Thanks to their low mass and high performances, composites drawan increasing interest in many fields, such as aeronautics. Nevertheless, composites structures are particularly vulnerable to out-of-plane solicitations.Research

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::f26df2870293cc46910c5f315301aed8
https://hal.archives-ouvertes.fr/hal-02421568

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