Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 2005.10a
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- Pages.914-917
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- 2005
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- 2005-8446(pISSN)
Measurement of Dynamic Elastic Modulus of Foil Material by ESPI and Sonic Resonance Testing
ESPI와 음향공진법을 이용한 Foil 재료의 동적탄성계수 측정
Abstract
The paper proposes a new sonic resonance test for a dynamic elastic constant measurement which is based on time-average electronic speckle pattern interferometry(TA-ESPI)and Euler-Bernoulli equation. Previous measurement technique of dynamic 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 TA-ESPI dynamic elastic constant measurement technique is able to give high accurate elastic modulus of materials through a simple experiment and analysis.
Keywords
- TA-ESPI(Time Average Electronic Speckle Pattern Interferometery);
- Dynamic Elastic Modulus;
- Euler-Bernoulli Beam;
- Foil Copper
- 동적탄성계수;
- 오일러-베르누이 빔;
- 구리박판;