Validating FE Hybrid III, THOR, and GHBMC M50-OS for future spaceflight configuration testing

McNamara, Kyle P.; Jones, Derek A.; Gaewsky, James P.; Ye, Xin; Koya, Bharath; Saffarzadeh, Mona; Gayzik, F. Scott; Weaver, Ashley A.; Stitzel, Joel D.

Affiliations

²Virginia Tech-Wake Forest University Center for Injury Biomechanics

Abstract

Between 1976 and 2013, a combination of Hybrid III, THOR, and human volunteer tests were conducted using both the Horizontal Impulse Accelerator (HIA) and Vertical Deceleration Tower (VDT) at Wright-Patterson Air Force Base and USAF Armstrong. These tests formed a matrix for finite element (FE) validation. This study analyzes a physical test configuration with accelerations in the frontal (X-) direction. The acceleration magnitude was 10 G with a pulse duration of 70 ms. Simulations were performed using the Humanetics 50th percentile male Hybrid III, NHTSA THOR 50th male, and the Global Human Body Models Consortium (GHBMC) 50th male simplified occupant (M50-OS) FE models in LS_DYNA. All simulations consisted of a 150 ms period of gravitational settling and belt pretensioning followed by the acceleration pulse taken from the physical test of interest. Analysis consisted of both a visual comparison of kinematics as well as a quantitative analysis. Simulation acceleration signals in the head, neck, thorax, and pelvis as well as belt forces were compared to matched physical signals using the Gehre et al. method (CORrelation and Analysis, or CORA, size phase, and shape). Visual inspection for the test configuration simulations showed agreement with the physical test cases in regards to the excursion magnitude and direction of the thorax and the head. The CORA scores for the three simulations ranged from 0.613 to 0.908 on a scale from 0 to 1, with 1 being a perfect score.

Links

URL: http://ibrc.osu.edu/wp-content/uploads/2017/03/McNamara_IBS_v3.pdf

Cited Works (3)

Year	Entry
1994	Buhrman JR, Perry CE. Human and manikin head/neck response to +Gz acceleration when encumbered by helmets of various weights. Aviat Space Environ Med. December 1994;65(12):1086-1090.
2009	Gehre C, Gades H, Wernicke P. Objective rating of signals using test and simulation responses. In: Proceedings of the 21st International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 15-18, 2009; Stuttgart, Germany.
2015	Schwartz D, Guleyupoglu B, Koya B, Stitzel JD, Gayzik FS. Development of a computationally efficient full human body finite element model. Traffic Inj Prev. June 1, 2015;16(suppl 1):S49-S56.