Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.engstruct.2013.01.013
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dc.titleAn eta-approach to evaluate the elastic-plastic energy release rate for weld-toe cracks in tubular K-joints
dc.contributor.authorZhang, Y.
dc.contributor.authorQian, X.
dc.date.accessioned2014-10-09T07:35:49Z
dc.date.available2014-10-09T07:35:49Z
dc.date.issued2013-06
dc.identifier.citationZhang, Y., Qian, X. (2013-06). An eta-approach to evaluate the elastic-plastic energy release rate for weld-toe cracks in tubular K-joints. Engineering Structures 51 : 88-98. ScholarBank@NUS Repository. https://doi.org/10.1016/j.engstruct.2013.01.013
dc.identifier.issn01410296
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/90903
dc.description.abstractThis paper proposes an energy-based η approach to estimate the elastic-plastic energy release rate for shallow surface cracks located at the weld toe at the chord crown point near the tension brace in the circular hollow section (CHS) K-joint. This approach evaluates the elastic-plastic energy release rate using the area under the load versus the load-line displacement curve for large-scale tubular K-joints, similar to the conventional η approach used to calculate the energy release rate for facture specimens described in material testing standards. The present work demonstrates that the value of ηpl equals 1 for the shallow cracks considered in tubular K-joints. The effective width (Beff), via which the remaining ligament area (Alig) is calculated, depends on the geometry of the K-joints. The plastic η approach with the proposed effective width Beff, coupled with a previous development on the nonlinear load-deformation formulation for K-joints, predicts closely the elastic-plastic energy release rate along the crack front for cracked tubular K-joints, compared to the conventional domain-integral method. © 2013 Elsevier Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.engstruct.2013.01.013
dc.sourceScopus
dc.subjectCircular hollow section (CHS)
dc.subjectJ-integral
dc.subjectPlastic η approach
dc.subjectTubular joint
dc.subjectWeld-toe crack
dc.typeArticle
dc.contributor.departmentCIVIL & ENVIRONMENTAL ENGINEERING
dc.description.doi10.1016/j.engstruct.2013.01.013
dc.description.sourcetitleEngineering Structures
dc.description.volume51
dc.description.page88-98
dc.description.codenENSTD
dc.identifier.isiut000317804100008
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