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Optimum design of formable CFRP sheets by generic algorithm and FE analysis by homogenization of multilayered structure with macroscopic anisotropy

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Abstract

A new method for designing carbon-fiber-reinforced plastic (CFRP) sheets with a suitable ply structure for stamping is proposed. This method combines a generic algorithm with a three-dimensional finite element method (FEM) to reproduce a layered structure by homogenizing the fiber structure with elastic-plastic anisotropy of each layer. The maximum strain is used as a fracture index to evaluate the severity of sheet deformation under stamping. The ply structure of the CFRP is optimized for elliptic cup drawing, and the optimized ply structure is validated experimentally. Through the experimental validation, it is proven that the proposed method gives acceptable results for the optimization of the ply structure of thermosetting CFRP sheets for cold/warm stamping.

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Acknowledgments

This work was supported by a Grant-in-Aid for Scientific Research (A) (26249109) supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.

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Authors and Affiliations

  1. Graduate School of Engineering, The University of Tokyo, Tokyo, Japan

    Yuma Takahashi & Yu Uriya

  2. Institute of Industrial Science, The University of Tokyo, Tokyo, Japan

    Jun Yanagimoto

Authors
  1. Yuma Takahashi
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  2. Yu Uriya
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  3. Jun Yanagimoto
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Correspondence to Yu Uriya.

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Takahashi, Y., Uriya, Y. & Yanagimoto, J. Optimum design of formable CFRP sheets by generic algorithm and FE analysis by homogenization of multilayered structure with macroscopic anisotropy. Int J Mater Form 9, 697–703 (2016). https://doi.org/10.1007/s12289-015-1260-9

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  • DOI: https://doi.org/10.1007/s12289-015-1260-9

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