Figure 4.
Macroscopic images of crack propagation: “DCB 176-3 RL” (left); “DCB 192-2 TL” (right).
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.