Biomechanical Response of Military Booted and Unbooted Foot-Ankle-Tibia from Vertical Loading

2016-22-0010

11/07/2016

Event
60TH Stapp Car Crash Conference
Authors Abstract
Content
A new anthropomorphic test device (ATD) is being developed by the US Army to be responsive to vertical loading during a vehicle underbody blast event. To obtain design parameters for the new ATD, a series of non-injurious tests were conducted to derive biofidelity response corridors for the foot-ankle complex under vertical loading. Isolated post mortem human surrogate (PMHS) lower leg specimens were tested with and without military boot and in different initial foot-ankle positions. Instrumentation included a six-axis load cell at the proximal end, three-axis accelerometers at proximal and distal tibia, and calcaneus, and strain gages. Average proximal tibia axial forces for a neutral-positioned foot were about 2 kN for a 4 m/s test, 4 kN for 6 m/s test and 6 kN for an 8 m/s test. The force time-to-peak values were from 3 to 5 msec and calcaneus acceleration rise times were 2 to 8 msec. Compared to the neutral posture, the “off-axis” measures (e.g. shear and bending moment) were much greater in magnitude in plantar- or dorsi-flexed posture. The results as a function of velocity demonstrated uniform increases with increasing test velocities. The response corridors supplied from the present investigation will serve as initial design parameters for the ATD lower leg, and can also be used for validation for a human computational model.
Meta TagsDetails
DOI
https://doi.org/10.4271/2016-22-0010
Pages
39
Citation
Pintar, F., Schlick, M., Yoganandan, N., Voo, L. et al., "Biomechanical Response of Military Booted and Unbooted Foot-Ankle-Tibia from Vertical Loading," SAE Technical Paper 2016-22-0010, 2016, https://doi.org/10.4271/2016-22-0010.
Additional Details
Publisher
Published
Nov 7, 2016
Product Code
2016-22-0010
Content Type
Technical Paper
Language
English