Parametric Analysis of the Mandrel Geometrical Data in a Cold Expansion Process of Small Holes Drilled in Thick Plates

Calaf-Chica, Jose, Marín, Marta M., Rubio, Eva María, Teti, Roberto y Segreto, Tiziana . (2019) Parametric Analysis of the Mandrel Geometrical Data in a Cold Expansion Process of Small Holes Drilled in Thick Plates. Materials

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Título Parametric Analysis of the Mandrel Geometrical Data in a Cold Expansion Process of Small Holes Drilled in Thick Plates
Autor(es) Calaf-Chica, Jose
Marín, Marta M.
Rubio, Eva María
Teti, Roberto
Segreto, Tiziana
Materia(s) Ingeniería Industrial
Abstract Cold expansion technology is a cold-forming process widely used in aeronautics to extend the fatigue life of riveted and bolted holes. During this process, an oversized mandrel is pushed through the hole in order to yield it and generate compressive residual stresses contributing to the fatigue life extension of the hole. In this paper, a parametric analysis of the mandrel geometrical data (inlet angle straight zone length and diametric interference) and their influence on the residual stresses was carried out using a finite element method (FEM). The obtained results were compared with the conclusions presented in a previous parametric FEM analysis on the influence of the swage geometry in a swaging cold-forming process of gun barrels. This process could be considered, in a simplified way, as a scale-up of the cold expansion process of small holes, and this investigation demonstrated the influence of the diameter ratio (K) on the relation between the mandrel or swage geometry and the residual stresses obtained after the cold-forming process.
Palabras clave cold expansion
mandrel
cold-forming
swaging
Editor(es) MDPI
Fecha 2019-12-08
Formato application/pdf
Identificador bibliuned:DptoICyF-ETSI-Articulos-Mmarin-0005
http://e-spacio.uned.es/fez/view/bibliuned:DptoICyF-ETSI-Articulos-Mmarin-0005
DOI - identifier 10.3390/ma12244105
ISSN - identifier 1996-1944
Nombre de la revista Materials
Número de Volumen 12
Número de Issue 24
Publicado en la Revista Materials
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in Materials, is available online at the publisher's website: MDPI https://doi.org/10.3390/ma12244105
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Materials, está disponible en línea en el sitio web del editor: MDPI https://doi.org/10.3390/ma12244105

 
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Creado: Tue, 06 Feb 2024, 00:05:07 CET