Figure 15.
Vibration patterns at the GFRP specimen at 3.4 kHz (a) and at the LDR frequency, 20.9 kHz, on a GFRP sample (b), with permission from [119].
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.