Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Rafael M Afonso"'
Publikováno v:
Case Studies in Thermal Engineering, Vol 59, Iss , Pp 104551- (2024)
Heat exchangers are essential for various thermal applications, and their performance could be improved by optimization of layout/operating conditions or materials. The layout/operating conditions optimization has been widely subjected to research an
Externí odkaz:
https://doaj.org/article/ef177b8a481b492fb631e87d3893dc31
Autor:
Rafael M. Afonso, Luís M. Alves
Publikováno v:
International Journal of Lightweight Materials and Manufacture, Vol 6, Iss 4, Pp 512-520 (2023)
The utilization of an axial sheet bending-unbending cycle was previously utilized to produce mechanical joints of sheets to rods at ambient temperature by two subsequent operations. In this research, that joining process is now extended to produce a
Externí odkaz:
https://doaj.org/article/0b4f04d56b8d4a2f851446a9155edefc
Autor:
Rafael M. Afonso, Luís M. Alves
Publikováno v:
Metals, Vol 13, Iss 8, p 1472 (2023)
Double-sided self-pierce riveting (DSSPR) can be utilized as an alternative to self-pierce riveting (SPR) to produce butt joints through half-lap joints in dissimilar materials. The mechanical joining process makes use of tubular rivets with simple g
Externí odkaz:
https://doaj.org/article/95206fe9371043f18653a28ce4d6f9de
Autor:
Rafael M. Afonso, Luís M. Alves
Publikováno v:
Materials, Vol 16, Iss 3, p 1191 (2023)
Double-sided self-pierce riveting (DSSPR) has been presenting itself as a proper alternative to self-pierce riveting (SPR) with many advantages for joining geometries of different thicknesses and cross-sections. To ensure its successful future indust
Externí odkaz:
https://doaj.org/article/1796261f6fd74507993140719ac87f3c
Autor:
Rafael M. Afonso, Luís M. Alves
Publikováno v:
Journal of Manufacturing and Materials Processing, Vol 7, Iss 1, p 12 (2022)
Joining of tubes to tubes by means of plastic deformation at ambient temperature allows one to solve the main limitations produced by the necessity of joining thin-walled tubes of low-to-medium diameter size made from materials that are not suitable
Externí odkaz:
https://doaj.org/article/df4ba131b6be49888bae10bda5158406
Autor:
Rafael M. Afonso, Luís M. Alves
Publikováno v:
The International Journal of Advanced Manufacturing Technology. 124:2891-2901
Mechanical joints of sheets to rods by plastic deformation produced at room temperature away from the rod ends have been investigated in recent years but new developments are still needed. The process hereby presented relies in the axial bending of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2f0be69b10da373aa7837699512b088
https://doi.org/10.1007/s00170-022-10684-4
https://doi.org/10.1007/s00170-022-10684-4
Autor:
Rafael M. Afonso, Luís M. Alves
Publikováno v:
International Journal of Material Forming. 16
Important developments have been achieved for self-pierce riveting with the utilization of a double-sided tubular rivet that is able to join sheets of similar and dissimilar materials with different and larger thicknesses, while remaining hidden in-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d601da79800fdfb3df2d5c9dace26220
https://doi.org/10.1007/s12289-023-01760-5
https://doi.org/10.1007/s12289-023-01760-5
Publikováno v:
Materials, Vol 14, Iss 4, p 815 (2021)
This paper presents a new joining method by a forming process for attaching sheets to tube ends. The process consists of two different forming stages carried out sequentially in a single stroke. Firstly, the free tube end is flared by compression wit
Externí odkaz:
https://doaj.org/article/671a9eff4f6e42378f4e04533d02ca18
Publikováno v:
Production Engineering. 16:401-409
This paper is focused on solving the problems of positioning and alignment of rivets in double-sided self-pierce riveting by means of flat-bottom holes that are previously machined in the overlapped sheets with greater mechanical strength. The work c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a0cfa4028ec430c93f431133cdef300
https://doi.org/10.1007/s11740-021-01082-y
https://doi.org/10.1007/s11740-021-01082-y
Publikováno v:
The International Journal of Advanced Manufacturing Technology. 115:3679-3687
This paper is focused on double-sided self-pierce riveting (DSSPR) of overlapped sheets made from dissimilar materials with very different mechanical strengths. The methodology draws from previous work on sheets made from similar or identical materia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fb4f1591148c68cb78bff3c96bf5318
https://doi.org/10.1007/s00170-021-07426-3
https://doi.org/10.1007/s00170-021-07426-3