Assessment of Dynamic Young’s Modulus and Damping Ratio of Bamboo Fiber Reinforced Polymer Composites using Shock Wave

Kengo Yamamoto, Akito Takasaki, Naoki Hosoya

研究成果: Chapter

抄録

In recent years, polymer composites using natural fibers have attracted attention. To evaluate the aging process of the polymer composites caused by ultraviolet rays, one has to apply non-destructive tests. In this paper, we established an assessment system using laser-induced plasma shock wave as an impulse excitation to evaluate a Young’s modulus and a damping ratio of polymer composites composed of bamboo fiber and phenolic resin. A shock wave is generated when laser-induced plasma expands at a high velocity throughout the ambient. Measuring responses of the composites by a laser Doppler vibrometer, we obtain absolute value of Fourier spectra and their natural frequencies. We used those to determine dynamic Young’s moduli and damping ratios of the composites. We made the composites which were fabricated by a hot press using a mold. There were the same trend between the dynamic Young’s moduli obtained by our system and the ones measured by a three-point flexural bending test. We could additionally obtain the damping ratios of the composites.

本文言語English
ホスト出版物のタイトルMechanisms and Machine Science
出版社Springer Netherlands
ページ4217-4226
ページ数10
DOI
出版ステータスPublished - 2019 1 1

出版物シリーズ

名前Mechanisms and Machine Science
73
ISSN(印刷版)2211-0984
ISSN(電子版)2211-0992

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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