Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Karim Kheloufi"'
Autor:
F. Hamadi, Karim Kheloufi, Kada Boughrara, Cherifa Abid, El-Hachemi Amara, Samia Aggoune, Toufik Tamsaout
Publikováno v:
Defect and Diffusion Forum. 412:107-114
In order to predict the effect of the Marangoni convection and the morphology of melted stainless steel powder, during the selective laser melting (SLM) process, a transient three-dimensional numerical model is developed at the mesoscale. The evoluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9440b3a4b9dfcdfd37c6b6823ccca6c7
https://doi.org/10.4028/www.scientific.net/ddf.412.107
https://doi.org/10.4028/www.scientific.net/ddf.412.107
Publikováno v:
South African Journal of Industrial Engineering, Vol 28, Iss 3, Pp 178-187 (2017)
South African Journal of Industrial Engineering, Volume: 28, Issue: 3, Pages: 178-187, Published: 2017
South African Journal of Industrial Engineering, Volume: 28, Issue: 3, Pages: 178-187, Published: 2017
A theoretical approach based on a numerical simulation using experimental data is proposed as a contribution to the study of laser-based additive manufacturing by direct energy deposition (DED). The aim is to simulate the stages of layer-by-layer bui
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c594a5548ca0deb0f8616932006e6991
http://sajie.journals.ac.za/pub/article/view/1855
http://sajie.journals.ac.za/pub/article/view/1855
Autor:
Kada Bougherara, Kamel Bourai, El-Hachemi Amara, Samia Aggoune, Karim Kheloufi, F. Hamadi, Toufik Tamsaout
Publikováno v:
ICREEC 2019 ISBN: 9789811554438
Metal particles arranged in a powder bed or injected through a nozzle can be used in manufacturing 3D parts by selective laser irradiation or directly deposited on a base material. To obtain complex manufactured parts suitable for a use in specific a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f952971117f57b7aebfa16048741c89
https://doi.org/10.1007/978-981-15-5444-5_53
https://doi.org/10.1007/978-981-15-5444-5_53
Autor:
El-Hachemi Amara, Karim Kheloufi
Publikováno v:
Advanced Materials Research. 856:220-225
A numerical analysis of the role of the gas friction force on the shape of the melt surface in laser cutting process is carried out. The liquid film shape is analyzed in the central plane of cutting for both cases with the pressure gradient force onl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1453f378598afedb54bd2456e3c3e1bb
https://doi.org/10.4028/www.scientific.net/amr.856.220
https://doi.org/10.4028/www.scientific.net/amr.856.220
Publikováno v:
Advanced Materials Research. 227:17-22
A 3-D transient modelling based on the numerical resolution of the fluid flow ant the heat transfer equations is developed for butt welding using the cladding process. The physical mechanisms included in our model concern the matter melting, and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ede0a99b9320862f1707c7e4921a304
https://doi.org/10.4028/www.scientific.net/amr.227.17
https://doi.org/10.4028/www.scientific.net/amr.227.17
Autor:
El-Hachemi Amara, Karim Kheloufi
Publikováno v:
Advanced Materials Research. 227:134-137
A three dimensional model for direct laser powder deposition process is developed to simulate the geometry and the thermal field in building a single-bead wall (thin-wall). This model was employed using the Fluent commercial code to which several mod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eeb84c1d4bce2d450eaf2d9fbc9069d1
https://doi.org/10.4028/www.scientific.net/amr.227.134
https://doi.org/10.4028/www.scientific.net/amr.227.134
Autor:
Karim Kheloufi, El-Hachemi Amara
Publikováno v:
Physics Procedia. 5:347-352
A numerical model describing the diphasic jet of gas/powder issued from a coaxial nozzle used in laser cladding is presented. The model is based on the discrete phase model (DPM), and is applied in the case of turbulent fluid flows with solid dispers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1690b82ade71319c68419bd2096f6072
https://doi.org/10.1016/j.phpro.2010.08.061
https://doi.org/10.1016/j.phpro.2010.08.061
Publikováno v:
Journal of Heat Transfer. 137
In the present study, a three-dimensional transient numerical model was developed to study the temperature field and cutting kerf shape during laser fusion cutting. The finite volume model has been constructed, based on the Navier–Stokes equations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::abad1bdb35bf8f1026b36cc57e5ad7e5
https://doi.org/10.1115/1.4030658
https://doi.org/10.1115/1.4030658
Publikováno v:
International Congress on Applications of Lasers & Electro-Optics.
We develop a study on laser cutting of metals withassist gas jet, the aim is to investigate the effect of the beam wavelength on striation formation. The finite volume method is used to discretize the differential governing conservation equations, wh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7848a8539bdf27e8cbacd28972480a83
https://doi.org/10.2351/1.5063243
https://doi.org/10.2351/1.5063243
A theoretical approach based on a numerical simulation using experimental data is proposed as a contribution for the study of laser metal cutting under gas assistance. The aim is to simulate the stages of the kerf formation by considering the induced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8aee4cbdaa795be292ef513b28789a3
https://hdl.handle.net/10985/9881
https://hdl.handle.net/10985/9881