Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ijmachtools.2008.05.001
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dc.titleThe effect of tool edge radius on the contact phenomenon of tool-based micromachining
dc.contributor.authorWoon, K.S.
dc.contributor.authorRahman, M.
dc.contributor.authorNeo, K.S.
dc.contributor.authorLiu, K.
dc.date.accessioned2014-10-07T09:11:49Z
dc.date.available2014-10-07T09:11:49Z
dc.date.issued2008-10
dc.identifier.citationWoon, K.S., Rahman, M., Neo, K.S., Liu, K. (2008-10). The effect of tool edge radius on the contact phenomenon of tool-based micromachining. International Journal of Machine Tools and Manufacture 48 (12-13) : 1395-1407. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ijmachtools.2008.05.001
dc.identifier.issn08906955
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/85760
dc.description.abstractThe contact phenomenon during micromachining is complicated due to the tool edge radius. This paper presents investigation of the effects of tool edge radius on the frictional contact and flow stagnation phenomenon, the stick-slide behavior and contact stress distributions, the evolutions of contact length, and the relationship between material deformation and total contact length. Through the arbitrary Lagrangian-Eulerian FE modeling approach, our findings revealed that the flow stagnation during material separations could be attributed to the counterbalance of shear contact components and it appeared to be insensitive to machining magnitude where a constant stagnation point angle of 58.5±0.5° was determined for a wide range of undeformed chip thicknesses. Three distinctive sticking and sliding regions associated with the flow stagnation phenomenon on the cutting tool were discovered following the identification of two stress criteria for sticking, τf=0 and/or τf=kf. In addition, the influence of tool edge radius on contact length and material deformation was determined and a theoretical model for the contact length of tool-based micromachining was proposed. It was also observed that tool-chip contact evolved in two successive stages through a series of intermittent sticking and sliding interactions as governed by the undeformed chip thickness and the transition of effective rake angle. An ultraprecision machining setup coupled with a high-speed and small field-of-view photography technique was proposed for experimental substantiation of the numerical results. © 2008 Elsevier Ltd. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.ijmachtools.2008.05.001
dc.sourceScopus
dc.subjectContact phenomenon
dc.subjectMicromachining
dc.subjectStick-slide
dc.subjectTool edge radius effect
dc.typeArticle
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1016/j.ijmachtools.2008.05.001
dc.description.sourcetitleInternational Journal of Machine Tools and Manufacture
dc.description.volume48
dc.description.issue12-13
dc.description.page1395-1407
dc.description.codenIMTME
dc.identifier.isiut000259431800011
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