| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Capturing 3D Temperature and Strain Fields using OBR Based Sensing in Additively Manufactured Parts |
| Author(s) |
Brian Hlifka, Gautum Parthasarathy, Glen Koste, Victor Ostroverkhov, Claire Henderson, Thomas Adcock, Thomas Dyson, Julin Wan, Robert Landers, Edward C. Kinzel |
| On-Site Speaker (Planned) |
Brian Hlifka |
| Abstract Scope |
In-situ temperature and stress monitoring is critical for preventing part failure and enables the collection of performance data for future designs. Single-mode (SM) optical fiber sensors are a viable option given their dimensions and high sensitivity. Distributed measurements along the length of the SM fiber are captured using optical backscattering reflectometry (OBR), where fluctuations in the density of the optical fiber core cause Rayleigh scattering. The fiber is integrated into both plastic and LPBF-manufactured parts. A discrete thermal or stress load generates a response along the fiber and the responses from a series of loads can be assembled to form the signature space for the part. A new unknown load can be measured by projecting the OBR response into this space, with locally variable coupling allowing the stress and temperature to be differentiated. The paper presents the approach along with several demonstrations. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |