Methodologies for Crack Initiation in Welded Joints Applied to Inspection Planning

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Show simple item record Zou, Guang Banisoleiman, Kian González, Arturo 2017-10-10T14:06:31Z 2017-10-10T14:06:31Z 2016-11
dc.identifier.citation World Academy of Science, Engineering and Technology en
dc.identifier.issn 2010-376X
dc.description.abstract Crack initiation and propagation threatens structural integrity of welded joints and normally inspections are assigned based on crack propagation models. However, the approach based on crack propagation models may not be applicable for some high-quality welded joints, because the initial flaws in them may be so small that it may take long time for the flaws to develop into a detectable size. This raises a concern regarding the inspection planning of high-quality welded joins, as there is no generally acceptable approach for modeling the whole fatigue process that includes the crack initiation period. In order to address the issue, this paper reviews treatment methods for crack initiation period and initial crack size in crack propagation models applied to inspection planning. Generally, there are four approaches, by: 1) Neglecting the crack initiation period and fitting a probabilistic distribution for initial crack size based on statistical data; 2) Extrapolating the crack propagation stage to a very small fictitious initial crack size, so that the whole fatigue process can be modeled by crack propagation models; 3) Assuming a fixed detectable initial crack size and fitting a probabilistic distribution for crack initiation time based on specimen tests; and, 4) Modeling the crack initiation and propagation stage separately using small crack growth theories and Paris law or similar models. The conclusion is that in view of trade-off between accuracy and computation efforts, calibration of a small fictitious initial crack size to S-N curves is the most efficient approach. en
dc.description.sponsorship European Commission Horizon 2020 en
dc.language.iso en en
dc.publisher World Academy of Science, Engineering and Technology en
dc.subject Crack initiation en
dc.subject Fatigue reliability en
dc.subject Inspection planning en
dc.subject Welded joints en
dc.title Methodologies for Crack Initiation in Welded Joints Applied to Inspection Planning en
dc.type Journal Article en
dc.status Not peer reviewed en
dc.identifier.volume 10 en
dc.identifier.issue 11 en
dc.identifier.startpage 1406 en
dc.identifier.endpage 1413 en
dc.neeo.contributor Zou|Guang|aut|
dc.neeo.contributor Banisoleiman|Kian|aut|
dc.neeo.contributor González|Arturo|aut|
dc.internal.rmsid 683898872 2017-07-23T08:50:00Z

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