Figure 5
From: Stress transfer law in laboratory hydraulic fracturing experiments

Schematic diagram of FBG sensor layout: (a) Specimen 1; (b) Specimen 2; (c) concrete-like specimen.
From: Stress transfer law in laboratory hydraulic fracturing experiments
Schematic diagram of FBG sensor layout: (a) Specimen 1; (b) Specimen 2; (c) concrete-like specimen.