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Fatigue analysis of the main frame of over head transportation vehicles using flexible multibody dynamics

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Abstract

The industrial over head transportation vehicle is a guided railway vehicle that is attached overhead and transports cargo, hoisting it up and down from the factory ceiling. The vehicle is widely used in many industries, such as automobile and liquid crystal display (LCD), because it can carry freight very safely and quickly to destinations. This kind of freight transportation usually operates for several months to a few years, carrying large amounts of products. Accidently, the vehicle often fails during operation because of a part’s plastic deformation from large loads. Furthermore, periodic dynamic loads cause fatigue accumulation, which leads to OHT failure. This failure is directly connected to significant economic loss during mass production processes. Therefore, the prediction of fatigue life for the important parts becomes an important task. In this study, the fatigue life of an OHT main frame was calculated and predicted by using a flexible multibody dynamic model. The development of a flexible multibody dynamic model and the procedure of fatigue life prediction were presented. To predict the fatigue lives of parts of interest, the prediction procedure required three kinds of data: Dynamic stress time history from a dynamic analysis, material properties of the parts, and stress-life curves of the parts. Using a finite element model and a multibody model, a flexible multibody model was developed. To ensure the reliability of the model, displacement and strain measurement tests were conducted. After verification of the reliability, the fatigue life of the main frame was predicted.

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Authors and Affiliations

  1. Graduate School of Mechanical Engineering, Ajou University, San5 Woncheon-dong, Yeongtong-gu, Suwon, 443-749, Korea

    Ji Won Yoon & Sung Pil Jung

  2. Department of Mechanical Engineering, Ajou University, San5 Woncheon-dong, Yeongtong-gu, Suwon, 443-749, Korea

    Tae Won Park

  3. Samsung Electronics Co. Ltd, 416, Maetan-3 dong, Yeongtong-gu, Suwon, 43-370, Korea

    Joong Kyung Park

Authors
  1. Ji Won Yoon
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  2. Sung Pil Jung
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  3. Tae Won Park
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  4. Joong Kyung Park
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Corresponding author

Correspondence to Tae Won Park.

Additional information

This paper was recommended for publication in revised form by Associate Editor Hong Hee Yoo

Ji Won Yoon Ph.D. in Mechanical Engineering from Ajou University, Suwon, Korea. Academic interests in multibody dynamics and flexible bodies. Currently, he is in a postdoctoral course and a research engineer in Research Center for Automotive Parts Technology, Ajou University.

Tae Won Park Ph.D. in Mechanical Engineering from University of Iowa, USA. Academic interests in multibody dynamics, flexible bodies, control and fatigue. Currently, he is a professor in Ajou University, working actively in various fields, such as railway vehicle, brake system and fatigue estimation.

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Yoon, J.W., Jung, S.P., Park, T.W. et al. Fatigue analysis of the main frame of over head transportation vehicles using flexible multibody dynamics. J Mech Sci Technol 24, 721–730 (2010). https://doi.org/10.1007/s12206-010-0111-3

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  • DOI: https://doi.org/10.1007/s12206-010-0111-3

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