Nondestructive dynamic complex moduli measurements using a Michelson fiber interferometer and a resonant bar technique

David A. Brown; Beng-Hock Tan; Steven L. Garrett

doi:10.1117/12.24845

1 December 1990 Nondestructive dynamic complex moduli measurements using a Michelson fiber interferometer and a resonant bar technique

David A. Brown, Beng-Hock Tan, Steven L. Garrett

Author Affiliations +

Proceedings Volume 1370, Fiber Optic Smart Structures and Skins III; (1990) https://doi.org/10.1117/12.24845
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

Abstract

An optical fiber, used as a leg of a Michelson interferometer, is cast into a long cylindrical bar of E-CAST F-82 epoxy. The bar can be selectively excited in any of its lowest flexural, torsional, and longitudinal modes. The interferometer is used to detect the resonant modes of the 'free-free' bar and from these modes both the Young's and shear elastic moduli are determined. The complex modulus is determined by measuring the quality factor Q for each resonant mode. The measurement technique is entirely nondestructive, and yields results of two independent moduli with the same transducers.

Citation Download Citation

David A. Brown, Beng-Hock Tan, and Steven L. Garrett "Nondestructive dynamic complex moduli measurements using a Michelson fiber interferometer and a resonant bar technique", Proc. SPIE 1370, Fiber Optic Smart Structures and Skins III, (1 December 1990); https://doi.org/10.1117/12.24845

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