Assessment of behind armour blunt trauma risk for a combat helmet by a combined experimental and numerical method
conference paper
The objective of this research is to develop a method to assess the skull fracture and mild traumatic brain injury risk for so called Behind Armour Blunt Trauma (BABT) using a state of the art Finite Element (FE) model of the human head for which tolerance limits for these specific injury mechanisms are available. The back face deformation, resulting from a 9 mm full metal jacket bullet, of a military combat helmet is measured experimentally in 3D by a high speed photogrammetric technique. The experimental recordings of the dynamical back face deformation (BFD) have been digitized and coupled to an existing predictive human head FE model. Head injury risk in terms of skull fracture and AIS2+ brain injury for a given dynamic BDF is assessed by numerical simulation. Moreover a numerical parametric study has been conducted, focusing on the stand-off of the helmet relatively to the head, by varying this distance from 19 mm to 24 mm. It is concluded that BABT results in serious risk on skull fracture or AIS2+ and is strongly sensitive for the helmet stand-off.
TNO Identifier
952876
Source title
PASS2018 - 14th Personal Armour Systems Symposium 2018, Washington, DC, USA, 1-5 October 2018
Pages
516-526
Files
To receive the publication files, please send an e-mail request to TNO Repository.