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dc.contributor.authorSnow, Gregory L.en_US
dc.date.accessioned2014-03-14T20:38:29Z
dc.date.available2014-03-14T20:38:29Z
dc.date.issued2008-05-13en_US
dc.identifier.otheretd-05242008-173645en_US
dc.identifier.urihttp://hdl.handle.net/10919/33200
dc.description.abstractThe objective of this research was to establish a relationship between arc spot weld shear strength and the arc time used to form the weld. Lap shear tests were performed on both 3/4 in. and 5/8 in. nominal diameter welds. Each weld was formed in one-, two-, or four-layers of sheet steel ranging from 22 gauge (0.028 in.) to 16 gauge (.057 in.). Three distinct time series were tested for each unique weld size, thickness of sheet steel and layer configuration. The first of these series were the full-time welds. The two remaining series, 2/3-time and 1/3-time welds, had arc times equal to 2/3 and 1/3 of the average full-time weld arc time, respectively. Both weld shear strength tests and weld sectioning were performed for each series of weld. Strength tests were performed on a minimum of three specimens from every weld series. If the strength of any specimen deviated by over ten percent from the mean strength, an additional specimen was tested, helping to better understand the true behavior of the weld. Comparisons were made between the strengths of full-time, 2/3-time and 1/3-time welds. Comparisons were also made between the observed strength of each weld and the strengths calculated using the 2001 AISI Specification. Each sectioning test involved measuring and documenting the visual diameter, average diameter and effective diameter of the weld. Weld penetrations were also documented as sufficient or insufficient and any porosity was noted. A single sectioning test was performed for each full-time series, while three were performed for every 2/3-time and 1/3-time series. The data taken from the strength tests and the sectioning samples proved that welds formed using reduced arc times were considerably smaller and weaker than full-time welds. The tests also proved that proper penetration is not dependent on the arc time, but is instead a function of the welding current and sheet steel thickness.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartSnow_Gregory_ETD_Thesis.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectArc Spot Welden_US
dc.subjectPuddle Welden_US
dc.subjectSheet Steelen_US
dc.subjectMultiple Steel Sheetsen_US
dc.subjectArc Timeen_US
dc.titleStrength of Arc Spot Welds Made in Single and Multiple Steel Sheetsen_US
dc.typeThesisen_US
dc.contributor.departmentCivil Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineCivil Engineeringen_US
dc.contributor.committeechairEasterling, William Samuelen_US
dc.contributor.committeememberMurray, Thomas M.en_US
dc.contributor.committeememberCharney, Finley A.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-05242008-173645/en_US
dc.date.sdate2008-05-24en_US
dc.date.rdate2008-06-30
dc.date.adate2008-06-30en_US


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