Figure 1.
Four-point bending test: the specimen before the test in the test machine: (a) diagram of the test [44], (b) the specimen before test.
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.