대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2008년도 추계학술대회A
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- Pages.49-55
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- 2008
자유지지 박막의 기계적 물성 측정을 위한 띠굽힘시험기의 개발 및 검증
Development and validation of strip bending tester for measuring mechanical properties of freestanding thin films
- 발행 : 2008.11.05
초록
Strip bending test has been frequently utilized to measure the mechanical properties of freestanding thin films in substitute for the micro-tensile test. However, in spite of its simplicity and reliability, strip bending test has a few problems, for example, the measurement of strain and the calculation of stress at zero strain. In this study, these problems are precisely reviewed and proved. Upon this review, strip bending tester has been developed, which uses the confocal laser displacement meter to measure the deformed configuration of the specimen and the possibility and limitation of this testing system is carefully investigated including the estimation of uncertainty of the measurement of strain. Finally, to prevent errors and to improve the accuracy of this testing system, the shape of the specimen has been carefully studied and is proposed.