| Title: | Factors influencing the yielding constraint by cracked welded components |
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| Authors: | ID Kozak, Dražan (Author)
ID Vojvodič-Tuma, Jelena (Author)
ID Gubeljak, Nenad (Author)
ID Semenski, Damir (Author)
ID Inštitut za kovinske materiale in tehnologije (Copyright holder) |
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| Files: |  Materiali_in_tehnologije_2005_Kozak_et_al._Factors_influencing_the_yielding_constraint_by_cracked_welded_components_unlocked.pdf (793,79 KB)
MD5: A573A350E9EADD684751EE5FA8BDD0F9
 http://mit.imt.si/Revija/izvodi/mit0512/kozak.pdf
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| Language: | English |
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| Work type: | Professional work |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FS - Faculty of Mechanical Engineering
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| Abstract: | The effect of strength mismatch for welded joints performed with different geometries on the yielding constraint has been investigated in the context of single-edged fracture-toughness specimens subjected to bending SE(B) using the finite-element method. The crack was located in the centre of the weld. Two geometri cal parameters have been identified as being the most important: the crack-Iength ratio a/W and the sIenderness of the welded joint (W-a)/H. They were systematically varied as follows: a/W = 0.1; 0.2; 0.3; 0.4; 0.5 and W = 2H, 4H, 8H, 16H, 24H. Basic equations and plane-strain finite-element solutions for the overmatched SE(B) specimen with all configuration combinations are given. The results are in good agreement with those in literature. This paper aims to establish yield-Ioad solutions for the same weldment configurations, but with materials dissimilarity present within the weld. This situation is usually encountered during repair welding. For this purpose, a practical combination of filler materials, with the same portion of overmatched part with M = 1.19 and undermatched part with M = 0.86, has been selected. Plane-strain solutions for the heterogeneous weld with the cracklocated in the overmatched half were obtained. The influence of the yielding-constraint key parameters has al so been evaluated. Yield-Ioad results for the specimens performed with different weld widths have the greatest scattering for the a/W = 0.5. The transition from the overmatched to the undermatched solution with increasing H is evident. On the other hand, the behaviour of the specimen with a shallow crack is dictated by the overmatch region ahead of the crack tip and depends very little on the weld slenderness. An approximated 3-D area of the yield-Ioad solutions depending ona/W and (W-a)lH has been proposed. Furthermore, the stress triaxility parameter h has been calculated using 2-D and 3-D finite-element analysis, and given as a field in the spec imen to get an insight into yielding-constraint regions. It was found that the 3-D yield-Ioad solutions are very close to the plane-strain solutions. Also, the effect of a/W on the yielding constraint is more significant than the effect of Mand (W-a)/H. |
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| Keywords: | welded structures, welded joints, fracture mechanics, cracks, SE(B) specimens, yielding load, yielding constraint parameters |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Year of publishing: | 2005 |
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| Number of pages: | str. 29-36 |
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| Numbering: | Letn. 39, št. 1/2 |
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| PID: | 20.500.12556/DKUM-65181  |
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| ISSN: | 1580-2949 |
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| UDC: | 621.791.05:539.4 |
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| ISSN on article: | 1580-2949 |
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| COBISS.SI-ID: | 9603862 |
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| NUK URN: | URN:SI:UM:DK:2CMQIGBN |
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| Publication date in DKUM: | 06.04.2017 |
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| Views: | 1632 |
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| Downloads: | 150 |
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| Metadata: |    |
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| Categories: | Misc.
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