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Journals / European Mechanical Science / 2023 / Cilt: 7 Sayı: 3

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

Osman Bahadır ÖZDEN
Barış GÖKÇE
Pages
184–191
Publication Date
2023-09-20
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Approaches for structural reliability in a welded joint structure designed for the defense industry are proposed.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Welded joints are used in many industrial products and evaluations against static and dynamic stresses are important in terms of structure and life safety.
📊
Key Findings & Data:Vibration characteristics for modes up to 1000 Hz were determined by modal analysis of the structure.
💡
Conclusion & Impact:Approaches for structural reliability in a welded joint structure designed for the defense industry are proposed.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Welded joints · defense industry · finite element method

Abstract

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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Cite This Article

ÖZDEN, O. B., GÖKÇE, B. (2023). Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry. European Mechanical Science, Cilt: 7 Sayı: 3, 184–191. https://ajindex.com/articles/962799

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