In-situ strain sensing with fiber optic sensors embedded into stainless steel 316

Dirk Havermann, Jinesh Mathew, William N. Macpherson, Robert R. J. Maier, Duncan P. Hand

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Fiber Bragg Grating (FBG) sensors are embedded into Stainless Steel (SS) 316 components using bespoke Selective Laser Melting (SLM) technology. SS 316 material is added on substrates by SLM, incorporating U-shaped grooves with dimensions suitable to hold nickel coated optical fibers. Coated optical fibers containing fiber Bragg gratings for strain monitoring are placed in the groove. Melting subsequent powder layer on top of the fiber completes the embedding. Strain levels exceeding 3 m epsilon are applied to specimens and are measured by embedded fiber optic sensors. Elastic deformation of the steel component is reliably measured by the Bragg grating from within the component with high accuracy. During plastic deformation of the steel the optical fiber is slipping due to poor adhesive bonding between fused silica and metal surround.

Original languageEnglish
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015
EditorsJP Lynch, KW Wang, H Sohn
Place of PublicationBellingham
PublisherSPIE
Number of pages8
Volume9435
ISBN (Print)9781628415384
DOIs
Publication statusPublished - 11 May 2015
EventConference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems - San Diego, Canada
Duration: 9 Mar 201512 Mar 2015

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume9435
ISSN (Print)0277-786X

Conference

ConferenceConference on Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
CountryCanada
Period9/03/1512/03/15

Keywords

  • laser sintering
  • laser melting
  • optical fiber sensors
  • Bragg gratings
  • strain sensors
  • embedded fiber sensors
  • stainless steel
  • BRAGG-GRATINGS
  • FABRICATION
  • POWDERS

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Havermann, D., Mathew, J., Macpherson, W. N., Maier, R. R. J., & Hand, D. P. (2015). In-situ strain sensing with fiber optic sensors embedded into stainless steel 316. In JP. Lynch, KW. Wang, & H. Sohn (Eds.), Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015 (Vol. 9435). [94352W] (Proceedings of SPIE; Vol. 9435). SPIE. https://doi.org/10.1117/12.2083843