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Proceedings Paper

Development of localized constitutive relations for fiber optic sensors using a unit cell based slicing approach
Author(s): Santosh Ramachandran; Aditi Chattopadhyay; Robert Goldberg; Mark Seaver; Linfa Zhu
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Paper Abstract

A new technique to characterize localized linear elastic constitutive behavior within a Fiber Optic Sensor (FOS) embedded parallel to reinforcing fibers has been developed. A unit cell model has been developed with stresses anywhere within the unit cell formulated as a function of sensor strains. A slicing approach has been implemented within the unit cell to determine effective stresses within each slice of the unit cell. Different layers of the FOS are modeled using individual slices to model the stresses within a given slice. Numerical results are presented for SMF-28 FOS. The accuracy of the developed slicing based micromechanics approach has been validated by comparisons with results obtained using an established micromechanics analysis code based on the Generalized Method of Cells and a general purpose finite element technique. Effective unit cell stress results from all three models show close correlation to one another. In addition, convergence of normal stresses was also investigated with increasing volume fraction of surrounding reinforcing carbon fibers.

Paper Details

Date Published: 5 April 2006
PDF: 12 pages
Proc. SPIE 6173, Smart Structures and Materials 2006: Smart Structures and Integrated Systems, 61731G (5 April 2006); doi: 10.1117/12.659405
Show Author Affiliations
Santosh Ramachandran, Arizona State Univ. (United States)
Aditi Chattopadhyay, Arizona State Univ. (United States)
Robert Goldberg, NASA Glenn Research Ctr. (United States)
Mark Seaver, Naval Research Lab. (United States)
Linfa Zhu, Arizona State Univ. (United States)

Published in SPIE Proceedings Vol. 6173:
Smart Structures and Materials 2006: Smart Structures and Integrated Systems
Yuji Matsuzaki, Editor(s)

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