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.
The existence and values of the secondary branch stable folding angle 
with respect to Miura-Ori designs, assuming b = aI. The designs to the left of the dashed curve do not lead to secondary branch stability. The corresponding 
values for the designs to the right are shown by the contour lines.
