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Evaluation of Fatigue Damage in Short Carbon Fiber Reinforced Plastics Based on Thermoelastic Stress and Phase Analysis

  • Takahide Sakagami
  • Daiki Shiozawa
  • Yu Nakamura
  • Shinichi Nonaka
  • Kenichi Hamada
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

Short carbon fiber composite materials are receiving a lot of attentions because of their excellent moldability and productivity, however they show complicated behaviors in fatigue fracture due to the random fibers orientation. In this study, thermoelastic stress analysis (TSA) using an infrared thermography was applied to the evaluation of fatigue damage in short carbon fiber composites. Second harmonic component of thermoelastic temperature change that is obtained by lock-in processing based on double-frequency against loading frequency was conducted to identify the turbulence in thermoelastic waveform due to fatigue damage evolution. It was found that the portions showing high second harmonic component values coincided with the portions where delamination damages were detected.

Keywords

Nondestructive evaluation Thermoelastic stress analysis Second harmonic analysis Infrared camera Short carbon fiber reinforced plastics 

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Copyright information

© The Society for Experimental Mechanics, Inc. 2019

Authors and Affiliations

  • Takahide Sakagami
    • 1
  • Daiki Shiozawa
    • 1
  • Yu Nakamura
    • 1
  • Shinichi Nonaka
    • 2
  • Kenichi Hamada
    • 2
  1. 1.Department of Mechanical EngineeringKobe UniversityNada, KobeJapan
  2. 2.DIC CorporationChuo-ku, TokyoJapan

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