Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic cross and longitudinal sections of the concrete test beam with the position of sensors, where total force F = 2 × F1 and specimen span l is 1500 mm. R1—tested embedded FBG sensor, R2—reference HBM sensor, R3—tested 3D printed sensor, R4—reference strain gauge.
