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New Methodologies for Efficient and Accurate Fatigue Prediction of Seam Welds
Technical Paper
2013-01-1008
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The fatigue behavior of many structures, e.g. chassis components, or frame structures, often is restricted by the fatigue life of their welded joints. The fatigue of welds depends on the stress and strain histories in the toes and roots of the weld. Numerous research projects in the past have shown that knowing these stress histories (notch stresses) allows good fatigue prediction for welds. But the roots and toes are geometrically complex and of course also depending on the real welding process and therefore it efforts a lot of manual modeling to achieve local notch stresses by Finite Element simulation.
Due to this methods have been developed to simplify the modeling effort and evaluate the local stresses and fatigue from the local load situation in the weld joint itself. These methods had been restricted to sheet structures modeled by shell-elements. In thick structures more and more modeling by solid elements is used in practice. In several application sheets are welded to casted structures.
This paper shows a new approach to calculate the notch stresses for arbitrary connections between shells-shells, solids-solids and shells-solids and presents a new technology to automatically include the notch effect in the calculation using Neuber's microscopic structural length.
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Citation
Hack, M. and Zingsheim, F., "New Methodologies for Efficient and Accurate Fatigue Prediction of Seam Welds," SAE Technical Paper 2013-01-1008, 2013, https://doi.org/10.4271/2013-01-1008.Also In
References
- Modern Local Design Concepts for the Fatigue Assessment of Welded Structures - Industrial Applications Int J. Fatigue 34 1 122 2012
- Köttgen V.B. , Olivier R. , Seeger T. Fatigue Analysis of Welded Connections based on Local Stresses Darmstadt Conference EXPERT'91 Essen 21 February 1991 1991
- Anthes R.J. , Köttgen V.B. , Seeger T. Kerbformzahlen von Stumpfstößen und Doppel-T-Stößen [Stress concentration factors of butt welds and double T-welds] Schweißen und Schneiden 12 1993
- Anthes R.J. , Köttgen V.B. , Seeger T. Einfluss der Nahtgeometrie auf die Dauerfestigkeit von Stumpf- und Doppel-T-Stößen [Influence of the weld geometry on the fatigue limit of butt welds and double T-welds] Schweißen und Schneiden 9 1994
- Neuber H. ber die Berücksichtigung der Spannungskonzentration bei Festigkeitsberechnungen [About the consideration of the stress concentration in strength assessments 20 7 245 251 1968
- Radaj D. Design and analysis of fatigue resistant welded structures Abington Publishing Cambridge 1990
- Sonsino C.M. , Fricke W. , Bruyne F. de , Hoppe A. , Ahmadi A. , Zhang G. Notch stress concepts for the fatigue assessment of welded joints - Background and applications International Journal of Fatigue 34 1 2 16 2012
- Hobbacher A. Recommendations for fatigue design of welded joints and components IIW Document XIII-1823-07 2008
- Fricke W. Guideline for the fatigue assessment by notch stress analysis for welded structures IIW-Doc. XIII-2240-08/XV-1289-08 Graz 2008
- Zhang G. Method of effective stress for fatigue: Part I - A general theory International Journal of Fatigue 37 17 23 2012
- Zhang G. , Sonsino C.M. , Sundermeier R. Method of effective stress for fatigue: Part II - Applications to V-notches and seam welds International Journal of Fatigue 37 24 40 2012
- Koettgen , V. , Zingsheim , F. , Hack , M. , and Speckert , M. A New Approach for Numerical Fatigue Life Prediction of Parts or Systems with Seam Welds SAE Technical Paper 2003-01-2772 2003 10.4271/2003-01-2772
- LMS Virtual.Lab Rev 11, LMS International N.V. June 2012
- Oppermann H. , Kipping A. , Lengl E. , Eppler R. , Ruoff A. , Zhang G. et al. Vergleich der Berechnungsmethoden für die Lebensdauerabschätzung MIG/MAG geschweißter Bauteile in kommerzieller Software [Numerical methods to evaluate the fatigue life of MIG/MAG welded components in commercial codes] Festigkeit geschweißter Bauteile - Anwendbarkeit lokaler Nachweiskonzepte bei Schwingbeanspruchung, DVS-Report No. 256 2 84 94 2009
- Holler A. Finite Element based method for fatigue lifetime estimation of MIG/MAG welded aluminium structures of an automotive subframe from Daimler cars Institut de Soudure: Journee Aluminium Conference 2012 Villepinte - Paris 2012
- Ahmadi-Dahaj A. , Zhang G. , Zingsheim F. , Hack M. Evaluation of welded seams using the effective stress method based on the example of a torsion beam axle 39 th meeting of the DVM-fatigue group, DVM Bericht 139 181 196 Paderborn 2012
- VDA - AK 25 Fügetechnik χMCF - Extended Master Connection File - Document Format for the Interchange of Connection Information in the Automotive Industry, in preparation
- Kaffenberger M. , Vormwald M. Considering size effects in the notch stress concept for fatigue assessment of welded joints Computational Materials Science 64 71 78 2012
- Karge , M. Improvements in the Fatigue Assessment of Large Welded Structures Using the Nominal Stress Approach SAE Technical Paper 2012-01-1910 2012 10.4271/2012-01-1910
- Hack M. , Jung D. , Egner-Walter A. Optimized Analysis Process for the fatigue analysis of cast iron structures taking into account the local material structure MP Materials Testing 54 2012 7-8 497 502 2012