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Fatigue life prediction for toe ground welded joints

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Title: Fatigue life prediction for toe ground welded joints
Authors: Zhang, Yan-Hui yanhui.zhang@twi.co.uk, Maddox, Stephen J.1
Source: International Journal of Fatigue. Jul2009, Vol. 31 Issue 7, p1124-1136. 13p.
Subjects: Welded joint fatigue, Cracking of welded joints, Fracture mechanics, Numerical calculations, Strains & stresses (Mechanics), Lawrence, F. V.
Abstract: Abstract: The paper presents the results of an investigation of the effect of weld toe burr grinding on the fatigue performance of non-load-carrying transverse fillet welded joints. Crack initiation and propagation were monitored by a modified replica method. It was found that, although the average life increase due to toe grinding was in agreement with published data, the majority of the fatigue cracks in specimens that gave fatigue lives <∼106 cycles initiated at flaws just beneath the ground surface. Both the experiments and calculations based on fracture mechanics suggested that the fatigue lives of the toe ground joints in this life regime were dominated by the crack propagation process. However, in the long life regime (>106 cycles), crack initiation became significant. Reasonable estimates of the crack initiation period were made using the local stress approach proposed by Lawrence et al. [Lawrence FV, Mattos RJ, Higashida Y, Burk JD. Estimating the fatigue crack initiation life of welds. In: Hoeppner DW, editor, Fatigue Testing of Weldments, ASTM STP 648, American Society for Testing and Materials; 1978, p. 134–58]. The investigation suggested that more benefit from weld toe grinding could be claimed in the long (N >106 cycles) than the short life regime. [Copyright &y& Elsevier]
Copyright of International Journal of Fatigue is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 37574819
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Fatigue life prediction for toe ground welded joints
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Welded+joint+fatigue%22&quot;&gt;Welded joint fatigue&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Cracking+of+welded+joints%22&quot;&gt;Cracking of welded joints&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Fracture+mechanics%22&quot;&gt;Fracture mechanics&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Numerical+calculations%22&quot;&gt;Numerical calculations&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Strains+%26+stresses+%28Mechanics%29%22&quot;&gt;Strains &amp; stresses (Mechanics)&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Lawrence%2C+F%2E+V%2E%22&quot;&gt;Lawrence, F. V.&lt;/searchLink&gt;
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  Data: Abstract: The paper presents the results of an investigation of the effect of weld toe burr grinding on the fatigue performance of non-load-carrying transverse fillet welded joints. Crack initiation and propagation were monitored by a modified replica method. It was found that, although the average life increase due to toe grinding was in agreement with published data, the majority of the fatigue cracks in specimens that gave fatigue lives &lt;∼106 cycles initiated at flaws just beneath the ground surface. Both the experiments and calculations based on fracture mechanics suggested that the fatigue lives of the toe ground joints in this life regime were dominated by the crack propagation process. However, in the long life regime (&gt;106 cycles), crack initiation became significant. Reasonable estimates of the crack initiation period were made using the local stress approach proposed by Lawrence et al. [Lawrence FV, Mattos RJ, Higashida Y, Burk JD. Estimating the fatigue crack initiation life of welds. In: Hoeppner DW, editor, Fatigue Testing of Weldments, ASTM STP 648, American Society for Testing and Materials; 1978, p. 134–58]. The investigation suggested that more benefit from weld toe grinding could be claimed in the long (N &gt;106 cycles) than the short life regime. [Copyright &amp;y&amp; Elsevier]
– Name: AbstractSuppliedCopyright
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  Data: &lt;i&gt;Copyright of International Journal of Fatigue is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.ijfatigue.2009.01.003
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 1124
    Subjects:
      – SubjectFull: Welded joint fatigue
        Type: general
      – SubjectFull: Cracking of welded joints
        Type: general
      – SubjectFull: Fracture mechanics
        Type: general
      – SubjectFull: Numerical calculations
        Type: general
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Lawrence, F. V.
        Type: general
    Titles:
      – TitleFull: Fatigue life prediction for toe ground welded joints
        Type: main
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            NameFull: Zhang, Yan-Hui
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            NameFull: Maddox, Stephen J.
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          Dates:
            – D: 01
              M: 07
              Text: Jul2009
              Type: published
              Y: 2009
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              Value: 31
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            – TitleFull: International Journal of Fatigue
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