Effects of localized geometric imperfections on the stress behavior of pressurized cylindrical shells

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dc.contributor.advisor Keating , Peter B . en_US
dc.contributor.committeeMember Roesset , Jose M . en_US
dc.creator Rinehart , Adam James en_US
dc.date.accessioned 2004 -09 -30T01 :40 :41Z
dc.date.accessioned 2014 -02 -18T22 :28 :04Z
dc.date.available 2004 -09 -30T01 :40 :41Z
dc.date.available 2014 -02 -18T22 :28 :04Z
dc.date.created 2003 -08 en_US
dc.date.issued 2004 -09 -30T01 :40 :41Z
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /37
dc.description.abstract The influence of dent imperfections on the elastic stress behavior of cylindrical shells is explored . This problem is of central importance to the prediction of fatigue failure due to dents in petroleum pipelines . Using an approximate technique called the Equivalent Load Method , a semi -analytical model of two -dimensional dent stress behavior is developed . In the three -dimensional situation , decreased dent localization , in particular dent length , and increased dent depth are confirmed to cause dent stress concentration behavior to shift from having a single peak at the dent center to having peaks at the dent periphery . It is demonstrated that the equivalent load method does not predict this shift in stress behavior and cannot be relied upon to analyze relatively small , deep imperfections . The two stress modes of dents are associated with two modes of dent fatigue behavior that have significantly different fatigue lives . A method for distinguishing longer lived Mode P dents from shorter lived Mode C dents based on two measured features of dent geometry is developed and validated . An approach for implementing this analysis in the evaluation of real dents is also suggested . en_US
dc.format.extent 3161259 bytes
dc.format.medium electronic en_US
dc.format.mimetype application /pdf
dc.language.iso en _US en_US
dc.publisher Texas A &M University en_US
dc.subject pipeline dent fatigue en_US
dc.title Effects of localized geometric imperfections on the stress behavior of pressurized cylindrical shells en_US
dc.type Book en
dc.type.genre Electronic Dissertation en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

Citation

Effects of localized geometric imperfections on the stress behavior of pressurized cylindrical shells. Available electronically from http : / /hdl .handle .net /1969 .1 /37 .

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