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A study to maximize the crash energy absorption efficiency within the limits of crash space

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Abstract

The design of an engine room is important to protect the passenger from a crash impact by improving the absorption of the crash impact energy. The side member in the engine room absorbs most of the crash impact energy when the vehicle experiences a frontal crash. The side member is of two types: hat and ‘U.’ Analysis of the extent of energy absorption and the mechanism of the side member are necessary through a collapse mode in various load conditions. In this study, the design of experiments was used for evaluating the characteristics of the absorption of crash energy by side members through design variables. First, crash analysis was performed by experiment number extracted from the design of the experiment. Then, using the results of crash analysis, multiple regressions were conducted and sensitivity analysis performed for each design variable. Finally, the optimum design was developed for maximizing the absorption energy per unit weight considering various boundary conditions. In the present study, as a basic step for modeling the fatigue behavior of an extruded Al alloy cylinder, the fatigue crack growth data of the alloy was collected in two orientations. Microstructural analysis revealed that the material had recrystallized grains and clusters of constituent particles aligned in the direction of extrusion. Fatigue life of the samples revealed a shorter fatigue life representing a higher fatigue crack growth rate in the transverse direction.

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Authors and Affiliations

  1. School of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, 440-746, Korea

    Bae-Young Kim & Choong-Min Jeong

  2. Korea Automobile Testing & Research Institute (KATRI), Song-san meon, Hwaseong, 445-871, Korea

    Si-Woo Kim

  3. Department of Mechanical Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon, 440-746, Korea

    Myung-Won Suh

Authors
  1. Bae-Young Kim
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  2. Choong-Min Jeong
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  3. Si-Woo Kim
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  4. Myung-Won Suh
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Corresponding author

Correspondence to Myung-Won Suh.

Additional information

Recommended by Associate Editor Chang-Wan Kim

Yung-Won Suh received his B.S. degree in Mechanical Engineering from Seoul National University, Republic of Korea, in 1981. He then received his M.S. degree from the Korea Advanced Institute of Science and Technology in 1983 and his Ph.D. from the University of Michigan in 1989. Dr. Suh is currently a professor at the School of Mechanical Engineering in Sungkyunkwan University in Suwon, Korea. He serves as a committee member of the Korean Society of Automotive Engineers and Society of Automotive Engineers. He was the editor of the International Journal of Automotive Technology (IJAT) until 2007. Dr. Suh’s research interests include structural analysis, optimization, human factors, and evaluation of reliability.

Bae-Young Kim received his B.S. degree in Mechanical Engineering from Sungkyunkwan University, Republic of Korea, in 2006. He then received his M.S. degree from Sungkyunkwan University in 2008. Kim is currently a doctoral student at Sungkyunkwan University. Kim’s research interests include structural analysis, optimization, and human factors.

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Kim, BY., Jeong, CM., Kim, SW. et al. A study to maximize the crash energy absorption efficiency within the limits of crash space. J Mech Sci Technol 26, 1073–1078 (2012). https://doi.org/10.1007/s12206-012-0232-y

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  • DOI: https://doi.org/10.1007/s12206-012-0232-y

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