Experimental methodology for embedding fiber optic strain sensors in fiber reinforced composites fabricated by the VARTM/SCRIMP process

Published: 2003

Author(s):
Lopez-Anido, R.
Fifield, S.

Publication Name: Structural Health Monitoring

Publication URL: https://digitalcommons.library.umaine.edu/etd/2622/

Research Area:
Keywords:

Abstract:

Extrinsic Fabry-Perot Interferometric (EFPI) fiber optic strain sensors were embedded into fiber reinforced composite panels. The panels were fabricated by the SCRIMP process. Panels were cut into test coupons that contained an embedded EFPI fiber optic sensor. Control coupons were cut from the same panel and were tested under the same conditions as the coupons with embedded sensors. Both types of specimens, with and without fiber optic instrumentation, were instrumented with resistance strain gages. Output from the EFPI sensors are compared with conventional instrumentation to determine dependability of EFPI strain measurements. Material properties from tests performed on the coupons with embedded fiber optic sensors and the control coupons served to determine the following research objectives:

Optimal embedment techniques that provide accurate strain values.
Dependability and durability of embedded sensors
Effects of embedded EFPI strain sensors on composite properties and structural integrity.