한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제24권7호
  • /
  • Pages.69-74
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  • 2007
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  • 1225-9071(pISSN)
  • /
  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

Time Average ESPI와 Euler-Bernoulli 방정식에 의한 탄성계수 측정

Determination of Elastic Modulus by Time Average ESPI and Euler-Bernoulli Equation

  • 김경석 (조선대학교 기계설계공학과) ;
  • 이항서 (큐슈대학교 기계항공공학과) ;
  • 강영준 (전북대학교 기계공학부) ;
  • 강기수 (한국표준과학연구원 안전그룹)
  • 발행 : 2007.07.01
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초록

The paper proposes a new sonic resonance test for a elastic modulus measurement which is based on time-average electronic speckle pattern interferometry(TA-ESPI) and Euler-Bernoulli equation. Previous measurement technique of elastic constant has the limitation of application for thin film or polymer material because contact to specimen affects the result. TA-ESPI has been developed as a non-contact optical measurement technique which can visualize resonance vibration mode shapes with whole-field. The maximum vibration amplitude at each vibration mode shape is a clue to find the resonance frequencies. The dynamic elastic constant of test material can be easily estimated from Euler-Bernoulli equation using the measured resonance frequencies. The proposed technique is able to give high accurate elastic modulus of materials through a simple experiment set up and analysis.

키워드

참고문헌

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