• Title/Summary/Keyword: 짧은 섬유 강화 플라스틱

Search Result 1, Processing Time 0.015 seconds

Effects of Wave Attenuation on the Acoustic Emission Amplitude Distribution of Injection-Molded Fiber/Plastic Composites (섬유/플라스틱 사출성형 복합재료의 음향방출 진폭분포에 대한 감쇠효과)

  • Choi, N.S.;Takahashi, Kiyoshi
    • Journal of the Korean Society for Nondestructive Testing
    • /
    • v.18 no.1
    • /
    • pp.1-9
    • /
    • 1998
  • The attenuation of acoustic emission (AE) waves was evaluated for injection-molded short-fiber-reinforced thermoplastic composites employing simulated AE waves. Values of attenuation coefficient (${\alpha}$) decreased more with increasing fiber volume fraction ($V_f$) than that expected from a simple linear relation between ${\alpha}$ and $V_f$. The effect of wave attenuation was taken into account in a quantitative analysis of the AE peak amplitude distribution which was obtained from each zone partitioned in a specimen gage portion. The amplitude distribution compensated for the measured attenuation loss was exhibited almost similar in every zone of the specimen. Consequently, it was, shown that the AE amplitudes obtained from fiber/plastic composites were considerably affected by the attenuation.

  • PDF