Ultra Yüksek Mukavemetli Çeliklerden Yapılan Mobil Vinçlerdeki Kaynaklı Bağlantıların Yapısal Gerilim Yöntemi Kullanılarak Yorulma Ömrü Tahmini

Year 2025, Volume: 6 Issue: 1, 226 - 240, 19.06.2025

Osman Bahadır Özden , Barış Gökçe , Abdullah Erdemir

https://doi.org/10.55546/jmm.1669215

Abstract

Bu çalışmada, mobil vinç tasarım modelinin statik ve dinamik sonlu elemanlar analizi (FEA) yapılmış ve kaynaklı birleştirmelerin gerilmeleri yapısal sıcak nokta yöntemi ile incelenmiştir. Özellikle ultra yüksek dayanımlı çeliklerin (UHSS) kaynağında kaynak parametrelerinin seçimi mekanik özellikleri etkilemektedir. FEA sonuçlarına göre incelenen bölgeler için farklı malzeme ve kaynak parametreleri içeren numuneler hazırlanmış ve bu çalışmada uygulanan tahribatlı testler gerçekleştirilerek bir değerlendirme yaklaşımı önerilmiştir. Bu şekilde tahribatlı test sonuçları ve FEA değerlendirmeleri kullanılarak kaynaklı birleştirmelerin üretimindeki belirsizliklerin önüne geçilmiştir. Analiz sonucunda kaynaklı birleştirmelerin kritik bölgelerindeki maksimum asal gerilme için sıcak nokta değeri 527,54 MPa olarak bulunmuş ve S960QL malzemesi seçilmiştir. Bu çalışmalar sonucunda UHSS malzemeler tercih edilmiş ve kaynaklı birleştirmeler için minimum yorulma ömrü tahmini 13665 çevrim olarak hesaplanarak mobil vinç üretilmiştir.

Keywords

Yorulma ömrü tahmini , sonlu elemanlar analizi , mobil vinçler , ultra yüksek dayanımlı çelikler , kaynaklı bağlantılar.

Supporting Institution

MPG MAKİNE PRODÜKSİYON GRUBU MAKİNE İMALAT SANAYİ VE TİCARET A.Ş.

Thanks

MPG MAKİNE PRODÜKSİYON GRUBU MAKİNE İMALAT SANAYİ VE TİCARET A.Ş.

Fatigue Life Estimation of Welded Joints in Mobile Cranes with Ultra High Strength Steels Using the Structural Stress Method

Abstract

In this study, static and dynamic finite element analysis (FEA) of a mobile crane design model were per-formed and stresses of welded joints were examined by the structural hot spot method. Especially in the welding of ultra high strength steel (UHSS), choice of welding parameters affects mechanical properties. According to the FEA results, specimens containing different materials and welding parameters were prepared for investigated regions and an evaluation approach was proposed by performing destructive tests applied in this study. In this way, uncertainties in the production of welded joints are avoided by using destructive test results and FEA evaluations. As a result of the analysis, the hotspot value for maximum principal stress in critical regions of welded joints was found to be 527.54 MPa, and S960QL material was selected. As a result of these studies, UHSS materials were preferred and the minimum fatigue life estimate for welded joints was calculated as 13665 cycles and a mobile crane was produced.

Keywords

Fatigue life estimation , finite element analysis , mobile cranes , ultra-high strength steels , welded joints.

Supporting Institution

MPG MAKİNE PRODÜKSİYON GRUBU MAKİNE İMALAT SANAYİ VE TİCARET A.Ş.

Thanks

MPG MAKİNE PRODÜKSİYON GRUBU MAKİNE İMALAT SANAYİ VE TİCARET A.Ş.

References

• Ahola A., Leitner M., Grönlund K., Brunnhofer P., Buzzi C., Moshtaghi M., Björk T., Fatigue Assessment of as-Welded and Hfmi-Treated High-Strength Steel Joints under Variable Amplitude Loading Using Local Approaches. Welding in the World, 1-14, 2025.
• Ahola A., Salerto S., Loisa T., Lipiäinen K., Björk, T., Fatigue Strength of Single-Sided Fillet Welds in Overlapping Ultra-High-Strength Steel Sheets. Welding in the World 68(5), 1225-1239, 2024.
• Akyıldız U., Poyrazoğlu O., Demirel M. Y., Anodik Oksidasyonun Aa7050-T7451 Alaşımının Yorulma Performansına Etkisi. Politeknik Dergisi 26(1), 191-198, 2021.
• Al-Humaidi H., Tan F. H., Mobile Crane Safe Operation Approach to Prevent Electrocution Using Fuzzy-Set Logic Models. Advances in Engineering Software 40(8), 686-696, 2009.
• Baumgartner J., Hobbacher A., Levebvre F., Recent Update of the Iiw-Recommendations for Fatigue Assessment of Welded Joints and Components. Procedia Structural Integrity 57, 618-624, 2024.
• Berg J., Stranghöner N., Application of Design Concepts at High Frequency Hammer Peened Welded Ultra High Strength Steels, IABSE Symposium: Engineering for Progress, Nature and People, Madrid, Spain, 3-5 September 2014, 2014.
• Berg J., Stranghöner N., Fatigue Behaviour of High Frequency Hammer Peened Ultra High Strength Steels. International Journal of Fatigue 82, 35-48, 2016.
• Cheng T., Teizer J., Modeling Tower Crane Operator Visibility to Minimize the Risk of Limited Situational Awareness. Journal of Computing in Civil Engineering 28(3), 04014004, 2014.
• Esterl R., Sonnleitner M., Weißensteiner I., Hartl K., Schnitzer R., Influence of Quenching Conditions on Texture and Mechanical Properties of Ultra-High-Strength Steels. Journal of materials science 54(19), 12875-12886, 2019.
• Fass M., Hecht M., Baumgartner J., Bauer N., Evaluation of the Approach Based on the Maximum Principal Stress from the Iiw-Recommendation for Welded Joints under Proportional, Multiaxial Stress States. Welding in the World 67(10), 2323-2332, 2023.
• Fuštar B., Lukačević I., Dujmović D., Review of Fatigue Assessment Methods for Welded Steel Structures. Advances in Civil Engineering 2018, 2018.
• Galtier A., Statnikov E., The Influence of Ultrasonic Impacttreatment on Fatigue Behaviour of Welded Joints in High-Strength Steel. Welding in the World 48(5-6), 61-66, 2004.
• Gáspár M., Effect of Welding Heat Input on Simulated Haz Areas in S960ql High Strength Steel. Metals 9(11), 1226, 2019.
• Gök D. A., Baltacı A., Design and Fatigue Life Analysis of Air Suspension Z Type Leaf Springs Used in Heavy Commercial Vehicle. Politeknik Dergisi, 1-1, 2021.
• Hobbacher A., Recommendations for Fatigue Design of Welded Joints and Components, Springer, 2016.
• Im S., Park D., Crane Safety Standards: Problem Analysis and Safety Assurance Planning. Safety science 127, 104686, 2020.
• Lu F. Y., Zhu W., Xu G. N., Yang R. G., The Life Evaluation to Determine Remanufacturing Access Period of Telescopic Boom for Mobile Crane, Applied Mechanics and Materials, Trans Tech Publ, 2014.
• Mičian M., Harmaniak D., Nový F., Winczek J., Moravec J., Trško L., Effect of the T 8/5 Cooling Time on the Properties of S960mc Steel in the Haz of Welded Joints Evaluated by Thermal Physical Simulation. Metals 10(2), 229, 2020.
• Moravec J., Novakova I., Sobotka J., Neumann H., Determination of Grain Growth Kinetics and Assessment of Welding Effect on Properties of S700mc Steel in the Haz of Welded Joints. Metals 9(6), 707, 2019. Niemi E., Fricke W., Maddox S.J., Structural Hot-Spot Stress Approach to Fatigue Analysis of Welded Components. IIW doc 13, 1819-1800, 2018.
• Özden O. B., Gökçe B., Erdemir A., Investigation of Welded Joints in Finite Element Analysis, 2nd International Congress on Scientific Advances (ICONSAD’22),2022.
• Pamuk Ö., Durgutlu A., Patlama Kaynağı Yöntemi ile Birleştirilen Östenitik Paslanmaz Çelik (Aisi 316l)–S235jr Kompozit Malzemelerde Patlayıcı Oranının Mikroyapı Ve Yorulma Özelliklerine Etkisi. Politeknik Dergisi 21(3), 527-534, 2018.
• Pedersen M., Mouritsen O., Hansen, M. R., Andersen J. G., Wenderby J., Comparison of Post-Weld Treatment of High-Strength Steel Welded Joints in Medium Cycle Fatigue. Welding in the World 54(7-8), 208-217, 2010. Raviv G., Fishbain B., Shapira A., Analyzing Risk Factors in Crane-Related near-Miss and Accident Reports. Safety science 91, 192-205, 2017.
• Sadeghi S., Soltanmohammadlou N., Rahnamayiezekavat P., A Systematic Review of Scholarly Works Addressing Crane Safety Requirements. Safety science 133, 105002, 2021.
• Shin I. J., Factors That Affect Safety of Tower Crane Installation/Dismantling in Construction Industry. Safety science 72, 379-390, 2015.
• Sonsino C. M., Fricke W., De Bruyne F., 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. Statnikov E., Muktepavel V., Blomqvist A., Comparison of Ultrasonic Impact Treatment (Uit) and Other Fatigue Life Improvement Methods. Welding Research Abroad 50(5), 28-40, 2004.
• Tsutsumi S., Fincato R., Luo P., Sano M., Umeda T., Kinoshita T., Tagawa T., Effects of Weld Geometry and Haz Property on Low-Cycle Fatigue Behavior of Welded Joint. International Journal of Fatigue 156, 106683, 2022.
• Xu J., Du D., Song J., Li D., Li Y., Fatigue Performance Analysis of Steel Joints with High Frequency Mechanical Impact (Hfmi) Based on the Notched Stress Method. International Journal of Structural Integrity, 2025.
• Zhu J., Barsoum I., Barsoum Z., Khurshid M., Evaluation of Local Stress‐Based Fatigue Strength Assessment Methods for Cover Plates and T‐Joints Subjected to Axial and Bending Loading. Fatigue & Fracture of Engineering Materials & Structures 45(9), 2531-2548, 2022.