Random vibration fatigue of welded structures - Applications in the automotive industry

Teixeira, Giovanni; Roberts, Martin; Silva, Juliano Domingues da

doi:10.1016/j.prostr.2019.12.020

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…This method shows great advantage for the fatigue life evaluation of the welded structure under dynamic loads. Similar method was also presented by some other researchers and has been widely applied in aerospace, automotive et al (Pei et al, 2022;Teixeira et al, 2019;Ravi et al, 2022).…”

Section: Introductionmentioning

confidence: 75%

Random vibration-based virtual fatigue test for large-scale welded structures using frequency-domain structural stress method and its application to traction transformers

Min¹,

Xiao²,

Zheng³

et al. 2023

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PurposeThis paper aims to present an engineering computational method for fatigue life evaluation of welded structures on large-scale equipment under random vibration load.Design/methodology/approachBased on a case study of the traction transformers, virtual fatigue test (VFT) was proposed via numerical simulation approach. Static analysis was conducted to identify the risky zone and then dynamic response of the risky welds under random vibration load was calculated based on frequency-domain structural stress method (FDSSM) theory, life distribution and associated survivability at various locations of the structure were obtained. Structural modification was finally performed according to the evaluation results. Moreover, experimental test was carried out and compared with the virtual test result.FindingsBy applying the virtual test, fatigue life of the complex welded structures on large-scale equipment can be accurately and efficiently obtained considering dynamic effect under random vibration load. Meanwhile, risky welds can be directly determined and targeted modification scheme can be accordingly concluded. Validity of the VFT result was proved by comparing with the experimental test.Originality/valueThe proposed method can help obtain equivalent structural stress and fatigue life distribution of the welded structure at any position with various survivability and make quantitative evaluation on the life-extending effect of the structural modification. This method shows significant cost and efficiency advantages over experimental test during design stage of the large-scale structures in numerous manufacturing industries.

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Section: Introductionmentioning

confidence: 75%

Random vibration-based virtual fatigue test for large-scale welded structures using frequency-domain structural stress method and its application to traction transformers

Min¹,

Xiao²,

Zheng³

et al. 2023

View full text Add to dashboard Cite

show abstract

“…While evaluating the spectral analyses of the welded joint region, stress values can be determined using IIW approaches [21,22]. In addition, for structures with small thicknesses such as the automotive sector, evaluations can be made with methods such as BS7608 and Volvo method [23].…”

Section: Introductionmentioning

confidence: 99%

Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry

ÖZDEN,

GÖKÇE

2023

European Mechanical Science

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Welded joints are used in many industrial products and evaluations against static and dynamic stresses are important in terms of structure and life safety. It is very difficult to predict and model the vibration fatigue life of welded joints in the frequency plane under dynamic stresses. In this study, fatigue life estimation was made in the welded joint on a structure under vibration stresses in the frequency plane. Vibration characteristics for modes up to 1000 Hz were determined by modal analysis of the structure. In the MIL-STD 810G standard, power spectral density (PSD) is offered for composite wheeled vehicles, which are products of the defense industry. Random vibration analyzes were performed by defining PSD data as analysis input. With the effective notch stress approach, geometry and material S-N definitions were made and evaluations were carried out according to the Dirlik method. As a result of this study, the fatigue life of welded joints was determined as 4.582e+11 seconds. Approaches for structural reliability in a welded joint structure designed for the defense industry are proposed.

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Frequency Domain Fatigue Evaluation on SCR Girth-Weld Based on Structural Stress

Zhang,

Zhao

2024

China Ocean Eng

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Random vibration fatigue of welded structures - Applications in the automotive industry

Cited by 8 publications

References 8 publications

Random vibration-based virtual fatigue test for large-scale welded structures using frequency-domain structural stress method and its application to traction transformers

Random vibration-based virtual fatigue test for large-scale welded structures using frequency-domain structural stress method and its application to traction transformers

Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry

Frequency Domain Fatigue Evaluation on SCR Girth-Weld Based on Structural Stress

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