Fibre Bragg Grating sensor for shock wave diagnostics

18th APS-SCCM; 24th AIRAPT

Ravid, A.^1 ; Shafir, E.^1 ; Zilberman, S.^1 ; Berkovic, G.^1 ; Glam, B.^1 ; Appelbaum, G.^1 ; Gefen, A Fedotov^1

Applied Physics Division, Soreq NRC, Yavne

81800, Israel^1

关键词: 1550 nm;    Combined effect;    Dynamic loadings;    Elastic effects;    Fibre Bragg grating sensors;    Planar shock waves;    Shock fronts;    Shock stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/14/142029/pdf
DOI  :  10.1088/1742-6596/500/14/142029

来源: IOP

【 摘 要 】

We measured the response of short FBGs to a weak planar shock wave. The combined effect of the Photo-Elastic effect and the FBG strain was estimated theoretically depending on its orientation with respect to shock front (for 1550 nm FBG, parallel: 0.9 nm/kbar, perpendicular: -1.4 nm/kbar). The experimental results imply that the FBG/fibre survives for more than 1 μs at 5 kbar shock stress, and that our assumptions about the FBG behaviour under dynamic loading are valid, though more work is needed to fully quantify the effect.