Holmes, Gale A.
1995-present: Materials Research Engineer, Materials Science and Engineering Division, NIST
1977-1987: Supervisor, Dow Chemical Co.
Ph.D., Mechanical Engineering, Texas A&M University, 1994
M.S., Mechanical Engineering, Texas A&M University, 1992
B.S., Chemistry, University of Texas, 1977
Ballistic Fibers, Nano-Tailored Multi-functional Materials, Embedded Interfaces, Composite Micromechanics, Time-Dependent Relaxation Phenomena in Polymeric Systems
Awards and Honors
- Department of Commerce Gold Medal (2007)
- Chair Gordon Research Conference on Composites (2010)
- Vice-Chair Gordon Research Conference on Composites (2008)
|Folded and Unfolded PBO Fibers|
Research has shown that the mere folding of PBO fibers, the active component in some soft body armor, can cause a reduction of 15 % to 40 % in ballistic performance. This degradation mechanism in conjunction with hydrolytic degradation of these fibers can result in localized weak spots. This could lead to a catastrophic failure of the armor at a faster rate than occurs when only the hydrolytic degradation mechanism is considered. These results led to a revision of the soft body armor certification protocol.