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Investigation of deformation and collapse mechanism for magnesium tube in axial crushing test

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Abstract

This paper demonstrates the quasi-static axial compression and high-speed axial compression tests of extruded magnesium alloy circular tubes for evaluating the crash and fracture behavior of mg parts. To capture the buckling and fracture behavior of Mg tube during the axial compression tests, FE simulation adopts different types of flow curves depending on the deformation mode such as tension and compression with LS-DYNA software. The Mg tube undergoes compressive plastic strain prior to buckling while according to the model based on Hill yield criterion only bulging along the radial direction is predicted. Due to the tension-compression asymmetry of Mg alloys, diameter of Mg tube expands largely at the initial plastic strain before having bulging or folding while only a bulging mode typical for materials with cubic crystal structure can be predicted. Simulation results such as punch load and deformation mode are compared with experimental results in the axial crushing test with AZ61 alloy.

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Authors and Affiliations

  1. Korea Institute of Material Science (KIMS), 797 Changwondaero, Changwon, Gyeongnam, 642-831, Korea

    Jonghun Yoon & Youngseon Lee

  2. School of Mechanical Aerospace and Systems Engineering, KAIST, Daejeon, 305-701, Korea

    Hoon Huh

Authors
  1. Jonghun Yoon
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  2. Youngseon Lee
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  3. Hoon Huh
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Correspondence to Jonghun Yoon.

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Recommended by Guest Editor Haedo Jeong

Jonghun Yoon received his Ph.D. degrees from the School of Mechanical, Aerospace and Systems Engineering at KAIST in 2008. His research interests include plasticity in Mg alloy, computational mechanics in metal forming, and mechanical properties at high strain rate.

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Yoon, J., Lee, Y. & Huh, H. Investigation of deformation and collapse mechanism for magnesium tube in axial crushing test. J Mech Sci Technol 27, 2917–2921 (2013). https://doi.org/10.1007/s12206-013-0803-6

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  • DOI: https://doi.org/10.1007/s12206-013-0803-6

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