Predicting fatigue life of welded aluminium joints with combined bending and torsion using energy based criteria*
-
Tadeusz Lagoda
Abstract
This paper presents calculations of fatigue life of aluminium welded joints (tube-tube and flange-tube) under pure bending, pure torsion, and combined in- and out-of-phase bending with torsion, compared with against experimental results. In order to reduce a multiaxial loading state to an equivalent uniaxial state, an energy-based criteria is applied in the critical plane where cracking occurs. The best results were obtained using the criterion of maximum shear strain energy density for calculating equivalent local stress amplitude for tube-tube welded joints, for both proportional and non-proportional bending with torsion. For flange-tube joints under proportional and non-proportional bending with torsion, the best results were obtained using the criterion of maximum shear and normal strain energy density.
Kurzfassung
Im vorliegenden Beitrag werden Berechnungen zur Lebensdauer von Aluminiumschweißverbindungen (Rohr-Rohr- und Rohr-Flansch-Verbindungen) unter reiner Biegung und unter einer Kombination von Biegung mit Torsion vorgestellt und mit experimentellen Ergebnissen verglichen. Um den multiachsialen Beanspruchungszustand auf eine uniachsiale Belastung zu reduzieren, wurde ein ergiebasiertes Kriterium in der kritischen Ebene angewendet. Die besten Ergebnisse wurden erzielt, indem das Kriterium der maximalen Scher-Verformungsenergiedichte in der kritischen Ebene genutzt wurde, um die äquivalente lokale Spannungsamplitude für die Rohr-Rohr-Schweißungen zu berechnen, und zwar für beides, proportionale und nicht-proportionale Biegung mit Torsion. Für die Rohr-Flansch-Verbindungen unter proportionaler und nicht-proportionaler Biegung mit Torsion wurden die besten Resultate erreicht, indem das Kriterium der maximalen Scherung und der Normaldehnungsenergiedichte angewendet wurde.
References
1 Macha, E.; Sonsino, C. M.: Energy Criteria of Multiaxial Fatigue Failure, Fatigue Fract. Engng. Mater. Struct.22 (2000) pp. 1053–107010.1046/j.1460-2695.1999.00220.xSearch in Google Scholar
2 L/agoda, T.; Macha, E.: A Review of High-Cycle Fatigue Models under Non-Proportional Loadings, In: Fracture from Defects, Proc. ECF-12, Sheffield, Eds. Brown, M. W., de los Rios, E. R. and Miller, K. J., EMAS I (1998) pp. 73–78Search in Google Scholar
3 L/agoda, T.; Macha, E.: Generalization of Energy Multiaxial Cyclic Fatigue Criteria to Random Loadings, Multiaxial Fatigue and Deformation: Testing and Prediction, ASTM STP 1387, Kalluri, S. and Bonacuse, P. J. (Eds.), American Society for Testing and Materials, West Conshohocken, PA (2000) pp. 173–19010.1520/STP13504SSearch in Google Scholar
4 L/agoda, T.; Macha, E.; Be¸dkowski, W.: A Critical Plane Approach Based on Energy Concepts: Application to Biaxial Random Tension-Compression High-Cycle Fatigue Regime, Int. J. Fatigue21 (1999) pp. 431–44310.1016/S0142-1123(99)00003-1Search in Google Scholar
5 L/agoda, T.; Macha, E.: Energy Approach to Fatigue Life Estimation under Combined Tension with Torsion, 7th Summer School of Fracture – Pokrzywna, Scientific Papers of Technical University of Opole, Z. 67, Opole Nr 269 (2001) pp. 163–182Search in Google Scholar
6 L/agoda, T.; Macha, E.; Sakane, M.: Correlation of Biaxial Low-Cycle Fatigue Lives of SUS304 Stainless Steel with Energy Parameter in Critical Plane at 923 K, In: 6th ISCCP – Bial/owiez·a, A. Jakowluk and Z. Mróz (Eds.), Technical University of Bialystok (1998) pp. 343–356Search in Google Scholar
7 L/agoda, T.: Energy Models for Fatigue Life Estimation under Random Loading – Part I – The Model Elaboration, Int. J. Fatigue23 (2001) pp. 467–48010.1016/S0142-1123(01)00016-0Search in Google Scholar
8 L/agoda, T.: Energy Models for Fatigue Life Estimation under Random Loading – Part II – Verification of the Model, Int. J. Fatigue23 (2001) pp. 481–48910.1016/S0142-1123(01)00017-2Search in Google Scholar
9 L/agoda, T.; Macha, E.: Fatigue Lives under Biaxial Random Loading According to Normal Stress, Strain and Strain Energy Density in the Critical Plane, Life Assesssment and Management for Structural Components, Proceedings of the Conference, Troshenko, V. T. (Ed.), Kijów (2000) pp. 119–124Search in Google Scholar
10 Macha, E.: Simulation Investigations of the Position of Fatigue Fracture Plane in Materials with Biaxial Loads, Mat.-wiss. u. Werkstofftech. VCH Verlagsgesellschaft mbH, D-6940 Weinheim (Germany) 20, Heft4 (1989) pp. 132–136; Heft 5 (1989) pp. 159–164Search in Google Scholar
11 L/agoda, T.; Macha, E.; Dragon, A.; Petit, J.: Influence of Correlations Between Stresses on Calculated Fatigue Life on Machine Elements, Int. J. Fatigue18 (1996) pp. 547–55510.1016/S0142-1123(96)00025-4Search in Google Scholar
12 Sonsino, C. M.; Kueppers, M.: Festigkeitsverhalten von Aluminiumschweißverbindungen unter mehrachsigen Spannungszuständen, AiF/DVS-Forschungsvorhaben Nr.10731 (1996-2000), Fraunhofer-Institut für Betriebsfestigkeit (LBF), Darmstadt (2001) (not published)Search in Google Scholar
13 Sonsino, C. M., Kueppers, M.: Fatigue Behaviour of Welded Aluminium under Multiaxial Loading, Proc. 6th Int. Conference on Biaxial/Multiaxial Fatigue and Fracture, Lisboa, Portugal 2001, ESIS, Vol. I, 2001, pp. 57–64Search in Google Scholar
© 2006, Carl Hanser Verlag, München
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- DGZfP-Mitteilungen
- Organschaft
- Fachbeiträge/Technical Contributions
- Normung von Prüfverfahren in der Bauakustik
- Fatigue damage of weld seams with and without postweld treatment under multiaxial loading*
- On ratchetting-based models of Wear and Rolling Contact Fatigue* (RCF)
- A constitutive high cycle fatigue damage model – based on the interaction between microplasticity and local damage*
- A statistical measure of the non-proportionality of stresses – investigations and applications*
- Multiaxial fatigue life and strength criteria for non-proportional loading*
- Predicting fatigue life of welded aluminium joints with combined bending and torsion using energy based criteria*
- Reliability evaluation of NDT techniques for Cu-welds for risk assessment of nuclear waste encapsulation
- Vorschau/Preview
- Vorschau
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- DGZfP-Mitteilungen
- Organschaft
- Fachbeiträge/Technical Contributions
- Normung von Prüfverfahren in der Bauakustik
- Fatigue damage of weld seams with and without postweld treatment under multiaxial loading*
- On ratchetting-based models of Wear and Rolling Contact Fatigue* (RCF)
- A constitutive high cycle fatigue damage model – based on the interaction between microplasticity and local damage*
- A statistical measure of the non-proportionality of stresses – investigations and applications*
- Multiaxial fatigue life and strength criteria for non-proportional loading*
- Predicting fatigue life of welded aluminium joints with combined bending and torsion using energy based criteria*
- Reliability evaluation of NDT techniques for Cu-welds for risk assessment of nuclear waste encapsulation
- Vorschau/Preview
- Vorschau
