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dc.creatorBeck, Gordon Thomasen_US
dc.date.accessioned2010-07-19T09:24:29Zen_US
dc.date.accessioned2013-01-04T04:45:57Z
dc.date.available2011-07-19T08:00:00Zen_US
dc.date.available2013-01-04T04:45:57Z
dc.date.created1965en_US
dc.date.issued1965en_US
dc.date.submitted1965en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-07192010-092429en_US
dc.description.abstractThis project was initiated to study the effects of the sheet metal on the process of punching circular holes with viscoelastic tooling. Two different kinds of aluminum sheet metal, each with four thicknesses were used in the experiments. The mechani­cal properties of the various sheets were evaluated with particular attention being paid to the mechanical anisotropy so that this could be related to the failure during the punching operation. A new high pressure retainer was designed and built for pressurization of the viscoelastic press pads. This along with existing equipment and auxiliary apparatus for the detection of secondary fracture was used to study the primary and secondary fractures. As a result of the analysis of the primary and secondary fractures a useful prediction equation was developed. The prediction equation, with limitations, can be used to esti­mate the pressure necessary to cause complete fracture when punching holes in the aluminum sheet metals. The secondary, fracture analysis yielded contour-type plots from which the suitability of certain combinations of the process variables can be determined. These plots show that for certain combina­tions complete fracture cannot be obtained with practical pressure ratios and with other combinations an optimum punch­ing condition can be established. Suggestions for future research on viscoelastic tooling have been presented.en_US
dc.language.isoen_USen_US
dc.titleAluminum sheet effects in viscoelastic punchingen_US
thesis.degree.departmentMechanical Engineeringen_US
thesis.degree.disciplineMechanical Engineeringen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberWhelan, John Michaelen_US
dc.contributor.committeeMemberHertz, Philip Barryen_US


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