A novel method to alleviate flash-line defects in coining process

Handle URI:
http://hdl.handle.net/10754/562699
Title:
A novel method to alleviate flash-line defects in coining process
Authors:
Xu, Jiangping; Khan, Kamran; El Sayed, Tamer S.
Abstract:
We employ a finite element framework based on a dynamic explicit algorithm to predict the flash-line defects in the coining process. The distribution of the flash-line is obtained by building a radial friction work model at the element level. The elasto-plastic behavior of porous materials undergoing large deformations is considered where the constitutive level updates are the result of a local variational minimization problem. We study the material flow at different strokes of the die across the entire coining process and observe that the change in the flow direction of the material in the rim region may contribute to the flash lines. Our proposed framework shows that a part of the rim region in which the flash-line defects appear is consistent with the reported experimental results. We also propose a novel method of redesigning the rim geometry of the workpiece to alleviate the flash-line defects which also shows good agreement with experiments. © 2012 Elsevier Inc. All rights reserved.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier
Journal:
Precision Engineering
Issue Date:
Apr-2013
DOI:
10.1016/j.precisioneng.2012.11.001
Type:
Article
ISSN:
01416359
Sponsors:
This work was fully funded by MUST baseline research funds.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorXu, Jiangpingen
dc.contributor.authorKhan, Kamranen
dc.contributor.authorEl Sayed, Tamer S.en
dc.date.accessioned2015-08-03T11:02:03Zen
dc.date.available2015-08-03T11:02:03Zen
dc.date.issued2013-04en
dc.identifier.issn01416359en
dc.identifier.doi10.1016/j.precisioneng.2012.11.001en
dc.identifier.urihttp://hdl.handle.net/10754/562699en
dc.description.abstractWe employ a finite element framework based on a dynamic explicit algorithm to predict the flash-line defects in the coining process. The distribution of the flash-line is obtained by building a radial friction work model at the element level. The elasto-plastic behavior of porous materials undergoing large deformations is considered where the constitutive level updates are the result of a local variational minimization problem. We study the material flow at different strokes of the die across the entire coining process and observe that the change in the flow direction of the material in the rim region may contribute to the flash lines. Our proposed framework shows that a part of the rim region in which the flash-line defects appear is consistent with the reported experimental results. We also propose a novel method of redesigning the rim geometry of the workpiece to alleviate the flash-line defects which also shows good agreement with experiments. © 2012 Elsevier Inc. All rights reserved.en
dc.description.sponsorshipThis work was fully funded by MUST baseline research funds.en
dc.publisherElsevieren
dc.subjectCoiningen
dc.subjectConstitutive modelen
dc.subjectFinite element analysisen
dc.subjectFlash lineen
dc.subjectRadial friction worken
dc.titleA novel method to alleviate flash-line defects in coining processen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalPrecision Engineeringen
kaust.authorXu, Jiangpingen
kaust.authorKhan, Kamranen
kaust.authorEl Sayed, Tamer S.en
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