Biomechanical Response of Military Booted and Unbooted Foot-Ankle-Tibia from Vertical Loading. Stapp Car Crash J 2016 Nov;60:247-285
Date
11/22/2016Pubmed ID
27871100DOI
10.4271/2016-22-0010Scopus ID
2-s2.0-85027535006 (requires institutional sign-in at Scopus site) 10 CitationsAbstract
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.
Author List
Pintar FA, Schlick MB, Yoganandan N, Voo L, Merkle AC, Kleinberger MAuthors
Frank A. Pintar PhD Chair, Professor in the Biomedical Engineering department at Medical College of WisconsinNarayan Yoganandan PhD Professor in the Neurosurgery department at Medical College of Wisconsin
MESH terms used to index this publication - Major topics in bold
AdultAged
Ankle
Ankle Injuries
Biomechanical Phenomena
Cadaver
Explosions
Foot
Foot Injuries
Humans
Male
Middle Aged
Military Medicine
Motor Vehicles
Posture
Shoes
Stress, Mechanical
Tibia
Weight-Bearing
