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.
(a) LEDs in condition 2 experience total fracture after experimental impacts. (b) Principal stress distribution of the back of the LED for condition 2 in the original configuration. High stress concentration can be observed at the interface of the LED and the dental model. A maximum principal stress of 1176 MPa was observed at 0.79 ms.
