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Three-point bending fatigue of cracked giant magnetostrictive materials under magnetic fields

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Abstract

This paper investigates the cyclic fatigue behavior in giant magnetostrictive materials with a crack under magnetic fields. Fatigue tests were performed in three-point bending with single-edge precracked-beam specimens, and the number of cycles to failure under sinusoidal mechanical loads and magnetic fields was obtained. A finite element analysis was also carried out, and the energy release rate was calculated. The effect of magnetic fields on the maximum energy release rate versus number of cycles to failure curve was then discussed. In addition, fracture surfaces were examined by scanning electron microscopy and laser microscopy to correlate with fatigue characteristics.

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Authors and Affiliations

  1. Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-02, Sendai, 980-8579, Japan

    Fumio Narita, Koji Shikanai & Yasuhide Shindo

  2. Department of Mechanical Engineering, Faculty of Engineering, Ibaraki University, Nakanarusawa-cho 4-12-1, Hitachi, 316-8511, Japan

    Kotaro Mori

Authors
  1. Fumio Narita
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  2. Koji Shikanai
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  3. Yasuhide Shindo
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  4. Kotaro Mori
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Correspondence to Fumio Narita.

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Narita, F., Shikanai, K., Shindo, Y. et al. Three-point bending fatigue of cracked giant magnetostrictive materials under magnetic fields. Acta Mech 228, 3867–3876 (2017). https://doi.org/10.1007/s00707-017-1925-1

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  • DOI: https://doi.org/10.1007/s00707-017-1925-1

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