Selection of an optimal, non-destructive inspection technique for welded components
Thesis (M.Eng.)--Memorial University of Newfoundland, 2009. Engineering and Applied Sciences Includes bibliographical references (leaves 128-134) The objective of this work is to select an optimum Non-Destructive Inspection (NDI) technique and its associated inspection interval for welded components...
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ftmemorialunivdc:oai:collections.mun.ca:theses4/158902 2023-05-15T17:23:34+02:00 Selection of an optimal, non-destructive inspection technique for welded components Khalifa, Mohamed, 1973- Memorial University of Newfoundland. Faculty of Engineering and Applied Sciences 2009 xiii, 139 leaves : ill. Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses4/id/158902 Eng eng Electronic Theses and Dissertations (13.91 MB) -- http://collections.mun.ca/PDFs/theses/Khalifa_Mohamed.pdf a2997216 http://collections.mun.ca/cdm/ref/collection/theses4/id/158902 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Welded joints--Inspection Welded joints--Nondestructive testing Text Electronic thesis or dissertation 2009 ftmemorialunivdc 2015-08-06T19:22:43Z Thesis (M.Eng.)--Memorial University of Newfoundland, 2009. Engineering and Applied Sciences Includes bibliographical references (leaves 128-134) The objective of this work is to select an optimum Non-Destructive Inspection (NDI) technique and its associated inspection interval for welded components subjected to cyclic loading. -- The objective function (total cost) is formulated as a function of the decision variables (controllable) and condition of the inspected asset (uncontrollable). Total cost consists of inspections cost and repairs cost over the lifetime and risk of failure as a result of the failure to detect a growing crack before it reaches a critical size. The decision variables are the reliability of the NDI technique and the inspection interval. Two main parameters are used to quantify the reliability of the NDI techniques. These are the Probability of Detection function (POD) and the Probability of False Calls, (PFC). Condition of the inspected asset is represented by the probability of the presence of a crack in the inspected asset at inspection time and the expected time to failure. The objective function is minimized for different NDI techniques subject to a safety constraint: that the probability of failure as a result of failure to detect a growing crack before it reaches the critical size does not exceed a predefined limit. The minimum values of the objective functions for all candidate NDI techniques are compared to determine the optimal NDI technique and its associated inspection interval. Thesis Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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English |
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Welded joints--Inspection Welded joints--Nondestructive testing |
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Welded joints--Inspection Welded joints--Nondestructive testing Khalifa, Mohamed, 1973- Selection of an optimal, non-destructive inspection technique for welded components |
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Welded joints--Inspection Welded joints--Nondestructive testing |
description |
Thesis (M.Eng.)--Memorial University of Newfoundland, 2009. Engineering and Applied Sciences Includes bibliographical references (leaves 128-134) The objective of this work is to select an optimum Non-Destructive Inspection (NDI) technique and its associated inspection interval for welded components subjected to cyclic loading. -- The objective function (total cost) is formulated as a function of the decision variables (controllable) and condition of the inspected asset (uncontrollable). Total cost consists of inspections cost and repairs cost over the lifetime and risk of failure as a result of the failure to detect a growing crack before it reaches a critical size. The decision variables are the reliability of the NDI technique and the inspection interval. Two main parameters are used to quantify the reliability of the NDI techniques. These are the Probability of Detection function (POD) and the Probability of False Calls, (PFC). Condition of the inspected asset is represented by the probability of the presence of a crack in the inspected asset at inspection time and the expected time to failure. The objective function is minimized for different NDI techniques subject to a safety constraint: that the probability of failure as a result of failure to detect a growing crack before it reaches the critical size does not exceed a predefined limit. The minimum values of the objective functions for all candidate NDI techniques are compared to determine the optimal NDI technique and its associated inspection interval. |
author2 |
Memorial University of Newfoundland. Faculty of Engineering and Applied Sciences |
format |
Thesis |
author |
Khalifa, Mohamed, 1973- |
author_facet |
Khalifa, Mohamed, 1973- |
author_sort |
Khalifa, Mohamed, 1973- |
title |
Selection of an optimal, non-destructive inspection technique for welded components |
title_short |
Selection of an optimal, non-destructive inspection technique for welded components |
title_full |
Selection of an optimal, non-destructive inspection technique for welded components |
title_fullStr |
Selection of an optimal, non-destructive inspection technique for welded components |
title_full_unstemmed |
Selection of an optimal, non-destructive inspection technique for welded components |
title_sort |
selection of an optimal, non-destructive inspection technique for welded components |
publishDate |
2009 |
url |
http://collections.mun.ca/cdm/ref/collection/theses4/id/158902 |
genre |
Newfoundland studies University of Newfoundland |
genre_facet |
Newfoundland studies University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (13.91 MB) -- http://collections.mun.ca/PDFs/theses/Khalifa_Mohamed.pdf a2997216 http://collections.mun.ca/cdm/ref/collection/theses4/id/158902 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
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