title: Role of helmet in the mechanics of shock wave propagation under blast loading conditions.
abstract: The effectiveness of helmets in extenuating the primary shock waves generated by the explosions of improvised explosive devices is not clearly understood. In this work, the role of helmet on the overpressurisation and impulse experienced by the head were examined. The shock wave-head interactions were studied under three different cases: (i) unprotected head, (ii) head with helmet but with varying head-helmet gaps and (iii) head covered with helmet and tightly fitting foam pads. The intensification effect was discussed by examining the shock wave flow pattern and verified with experiments. A helmet with a better protection against shock wave is suggested.
authors.affiliation: Department of Engineering Mechanics, University of Nebraska-Lincoln, Lincoln, NE 68588-0526, USA.
authors.forename: S
authors.initials: S
authors.lastname: Ganpule
authors.forename: L
authors.initials: L
authors.lastname: Gu
authors.forename: A
authors.initials: A
authors.lastname: Alai
authors.forename: N
authors.initials: N
authors.lastname: Chandra
mesh_terms: D001696:Biomechanical Phenomena / Q000502:physiology; D001698:Biomedical Engineering; D001753:Blast Injuries / Q000503:physiopathology* / Q000517:prevention & control*; D001930:Brain Injuries / Q000503:physiopathology* / Q000517:prevention & control*; D003198:Computer Simulation; D055119:Elastic Modulus; D004867:Equipment Design; D020342:Finite Element Analysis; D006260:Head Protective Devices / Q000706:statistics & numerical data; D006801:Humans; D016014:Linear Models; D008959:Models, Neurological; D012886:Skull / Q000033:anatomy & histology / Q000293:injuries / Q000502:physiology