Influence of static strength on the fatigue resistance of welds
The present paper deals with a fracture mechanic approach that employs the Resistance-Curve concept, in order to predict fatigue endurances of welded components, with different tensile strengths of the base metal. The Resistance-Curve method compares the total driving force applied to a crack with i...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://doi.org/10.1051/matecconf/201816513010 |
| _version_ | 1818735665654792192 |
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| author | Steimbreger Ceferino Gubeljak Nenad Enzinger Norbert Ernst Wolfgang Chapetti Mirco |
| author_facet | Steimbreger Ceferino Gubeljak Nenad Enzinger Norbert Ernst Wolfgang Chapetti Mirco |
| author_sort | Steimbreger Ceferino |
| collection | DOAJ |
| description | The present paper deals with a fracture mechanic approach that employs the Resistance-Curve concept, in order to predict fatigue endurances of welded components, with different tensile strengths of the base metal. The Resistance-Curve method compares the total driving force applied to a crack with its threshold for propagation, both defined as a function of crack length. The former depends on load scheme and weld geometry and it can be obtained from finite element analyses, while the second is inherently related to weld resistance. Results obtained herein showed that threshold curve shape is changed when static strength of the base material is modified. Consequently, its interaction with the driving force differed, giving raise to different fatigue endurances for various values of the tensile strength. However, this effect is only likely to be leveraged, provided that the initial crack length is small enough. In real welded structures, the presence of defects demands longer initial crack lengths to be used in calculations, at which the benefit of enhanced strength is minimised or even inverted. Moreover, at these lengths, the growing process is mainly controlled by weld geometry and long crack propagation threshold, whereas local properties become less important in fatigue limit prediction. |
| first_indexed | 2024-12-18T00:24:52Z |
| format | Article |
| id | doaj.art-b4bae1a36a594c0d9534897b1b83c356 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-18T00:24:52Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-b4bae1a36a594c0d9534897b1b83c3562022-12-21T21:27:15ZengEDP SciencesMATEC Web of Conferences2261-236X2018-01-011651301010.1051/matecconf/201816513010matecconf_fatigue2018_13010Influence of static strength on the fatigue resistance of weldsSteimbreger CeferinoGubeljak NenadEnzinger NorbertErnst WolfgangChapetti MircoThe present paper deals with a fracture mechanic approach that employs the Resistance-Curve concept, in order to predict fatigue endurances of welded components, with different tensile strengths of the base metal. The Resistance-Curve method compares the total driving force applied to a crack with its threshold for propagation, both defined as a function of crack length. The former depends on load scheme and weld geometry and it can be obtained from finite element analyses, while the second is inherently related to weld resistance. Results obtained herein showed that threshold curve shape is changed when static strength of the base material is modified. Consequently, its interaction with the driving force differed, giving raise to different fatigue endurances for various values of the tensile strength. However, this effect is only likely to be leveraged, provided that the initial crack length is small enough. In real welded structures, the presence of defects demands longer initial crack lengths to be used in calculations, at which the benefit of enhanced strength is minimised or even inverted. Moreover, at these lengths, the growing process is mainly controlled by weld geometry and long crack propagation threshold, whereas local properties become less important in fatigue limit prediction.https://doi.org/10.1051/matecconf/201816513010 |
| spellingShingle | Steimbreger Ceferino Gubeljak Nenad Enzinger Norbert Ernst Wolfgang Chapetti Mirco Influence of static strength on the fatigue resistance of welds MATEC Web of Conferences |
| title | Influence of static strength on the fatigue resistance of welds |
| title_full | Influence of static strength on the fatigue resistance of welds |
| title_fullStr | Influence of static strength on the fatigue resistance of welds |
| title_full_unstemmed | Influence of static strength on the fatigue resistance of welds |
| title_short | Influence of static strength on the fatigue resistance of welds |
| title_sort | influence of static strength on the fatigue resistance of welds |
| url | https://doi.org/10.1051/matecconf/201816513010 |
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