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Title: Smart Adhesive Joint with High-Definition Fiber-Optic Sensing for Automotive Applications

Journal Article · · Sensors
DOI: https://doi.org/10.3390/s20030614 · OSTI ID:1803994
 [1];  [2];  [2];  [2];  [3]; ORCiD logo [3];  [3];  [4];  [4]
  1. Univ. of Tennessee, Knoxville, TN (United States). Tickle College of Engineering; OSTI
  2. Univ. of Tennessee, Knoxville, TN (United States). Tickle College of Engineering
  3. The Dow Chemical Company, Midlands, MI (United States)
  4. Ford Research & Innovation Center, Dearborn, MI (United States)

Structural health monitoring of fiber-reinforced composite-based joints for automotive applications during their manufacturing and on-demand assessment for its durability in working environments is critically needed. High-definition fiber-optic sensing is an effective method to measure internal strain/stress development using minimally invasive continuous sensors. The sensing fiber diameters are in the same order of magnitude when compared to reinforcement (glass, basalt, or carbon fibers) used in polymer composites. They also offer a unique ability to monitor the evolution of residual stresses after repeated thermal exposure with varying temperatures for automotive components/joints during painting using an electrophoretic painting process. In this paper, a high-definition fiber-optic sensor utilizing Rayleigh scattering is embedded within an adhesive joint between a carbon fiber-reinforced thermoset composite panel and an aluminum panel to measure spatially resolved strain development, residual strain, and thermal expansion properties during the electrophoretic paint process-simulated conditions. The strain measured by the continuous fiber-optic sensor was compared with an alternate technique using thermal digital image correlation. The fiber-optic sensor was able to identify the spatial variation of residual strains for a discontinuous carbon fiber-reinforced composite with varying local fiber orientations and resin content.

Research Organization:
Collaborative Composite Solutions Corporation, Knoxville, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0006926
OSTI ID:
1803994
Journal Information:
Sensors, Journal Name: Sensors Journal Issue: 3 Vol. 20; ISSN SENSC9; ISSN 1424-8220
Publisher:
MDPI AGCopyright Statement
Country of Publication:
United States
Language:
English

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