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Fracture in hole-flanging produced by single point incremental forming
Cristino V.A.1; Montanari L.3; Silva M.B.4; Atkins A.G.2; Martins P.A.F.4
2014-06
Source PublicationInternational Journal of Mechanical Sciences
ISSN0020-7403
Volume83Pages:146-154
Abstract

Hole flanging produced by single point incremental forming is a new manufacturing process in which a sheet, with a concentric pre-cut hole and the outer periphery rigidly fixed by a blank holder, is progressively forced with a tool to produce cylindrical or conical smooth flanges. The formability limits of the process are known to be higher than those commonly found in hole-flanging produced by conventional press-working due to suppression of necking with a low growth rate of accumulated strains above the forming limit curve. The aim and objectives of the paper is to evaluate the critical values of fracture toughness and ductile damage at crack initiation according to different damage laws and to correlate these values with independently determined values of the forming limits at fracture. The presentation starts by tracing the strains and stresses of various positions over the surface of the hole-flanged parts at different intermediate stages of deformation. It is revealed that the strain loading ratios are constant for different material elements. From these data, the experimental values of accumulated damage at various positions are determined, particularly at the site of fracture. © 2014 Elsevier Ltd.

KeywordDuctile Damage Fracture Toughness Hole-flanging Incremental Sheet Forming Plasticity
DOIhttps://doi.org/10.1016/j.ijmecsci.2014.04.001
URLView the original
Indexed BySCI
WOS Research AreaEngineering ; Mechanics
WOS SubjectEngineering, Mechanical ; Mechanics
WOS IDWOS:000337010800014
PublisherPERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
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Citation statistics
Cited Times [WOS]:17   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.Universidade de Macau
2.University of Reading
3.Universidade de Sao Paulo - USP
4.Instituto Superior Técnico
Recommended Citation
GB/T 7714
Cristino V.A.,Montanari L.,Silva M.B.,et al. Fracture in hole-flanging produced by single point incremental forming[J]. International Journal of Mechanical Sciences,2014,83:146-154.
APA Cristino V.A.,Montanari L.,Silva M.B.,Atkins A.G.,&Martins P.A.F..(2014).Fracture in hole-flanging produced by single point incremental forming.International Journal of Mechanical Sciences,83,146-154.
MLA Cristino V.A.,et al."Fracture in hole-flanging produced by single point incremental forming".International Journal of Mechanical Sciences 83(2014):146-154.
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