Bragg-grating-based multiaxial strain sensing: its application to residual strain measurement in composite laminates

Jose Manuel Menendez; J. Alfredo Guemes

doi:10.1117/12.388115

12 June 2000 Bragg-grating-based multiaxial strain sensing: its application to residual strain measurement in composite laminates

Jose Manuel Menendez, J. Alfredo Guemes

Author Affiliations +

Proceedings Volume 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials; (2000) https://doi.org/10.1117/12.388115
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

The single peak of the spectrum of a fiber Bragg grating written in a standard low birefringence optical fiber splits in two peaks when a transverse strain field is applied due to the promotion of a strain induced birefringence. In a composite laminate, the theory predicts a plane stress state, which allows using a single embedded Bragg grating to obtain simultaneously both components of the strain field. After a brief review of the photoelastic theory, and the experimental verification of the suitability of the plane stress state hypothesis, some experiments are done with thick graphite fiber composite laminates with different lay-up sequences. Strong residual stresses are detected inside the laminate, in accordance with the theory of composite laminates. The response of embedded Bragg gratings must take into account these internal stresses in order to adequately interpret the experimental results.

Citation Download Citation

Jose Manuel Menendez and J. Alfredo Guemes "Bragg-grating-based multiaxial strain sensing: its application to residual strain measurement in composite laminates", Proc. SPIE 3986, Smart Structures and Materials 2000: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (12 June 2000); https://doi.org/10.1117/12.388115

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available