Figure 4.
Fracture surface of specimens S1 and S2 after disassembling the samples. The yellow box highlights the distinct failure mechanisms observed in the initial stages of propagation: adhesive failure for S1 and cohesive failure for S2.
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.