Figure 12.
Stiffness degradation in sample: (a) SW-26; (b) SW-44; (c) SW-62; (d) DW-26; (e) DW-44; (f) DW-62.
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.