Design of a Composite Combat Helmet Liner for Prevention of Blast- Induced Traumatic Brain Injury

摘要: Air blast-induced traumatic brain injuries (TBIs) represent a significant percentage of military personnel observed in Operation Enduring Freedom (OEF) and Iraqi (OIF). Prevalence TBIs is attributed to several factors, including improved body armor, diagnostic techniques, greater awareness, the increased threat attack by improvised explosive devices (IEDs). Though mechanisms are not fully understood, this serious problem that needs be addressed. The overall goal work presented report explore possible improvement Advanced Combat Helmet (ACH) liner increasing protection against TBIs. essential new element inclusion moveable or deformable materials sandwiched within foam dissipate blast energy, reduce peak transmitted pressure, stretch waveform before it reaches brain. Filler explored include glass beads, aerogel, glycerin, water. To contribute goal, description validation model dynamic response (modified) helmet head surrogate an air event report. An initial prototype for incorporating filler material technology designed manufactured. characteristics then assessed experimentally collecting pressure data during loading provided drive shock tube. Experimental carried out at Purdue University. A nonlinear finite developed using commercial code ABAQUS® describe experimentally. Consistency between results obtained numerically indicates accurately describes physics impinging on head. Several suggestions how may used optimize design providing maximum airblasts. Thesis Supervisor: Laurence R. Young Apollo Program Professor Astronautics Health Sciences Technology