Effect of loading rate on the compressive mechanics of the immature baboon cervical spine.
Thirty-four cervical spine segments were harvested from 12 juvenile male baboons and compressed to failure at displacement rates of 5, 50, 500, or 5000 mm/s. Compressive stiffness, failure load, and failure displacement were measured for comparison across loading rate groups. Stiffness showed a significant concomitant increase with loading rate, increasing by 62% between rates of 5 and 5000 mm/s. Failure load also demonstrated an increasing relationship with loading rate, while displacement at failure showed no rate dependence. These data may help in the development of improved pediatric automotive safety standards and more biofidelic physical and computational models.
Elias
Paul Z
PZ
Department of Bioengineering, University of Washington, Box 357962, Seattle, WA 98195, USA. pelias@u.washington.edu
Nuckley
David J
DJ
Ching
Randal P
RP
D000818:Animals; D002102:Cadaver; D002574:Cervical Vertebrae / Q000502:physiology*; D019245:Compressive Strength / Q000502:physiology*; D004548:Elasticity; D005260:Female; D066298:In Vitro Techniques; D008297:Male; D010215:Papio; D013718:Tensile Strength / Q000502:physiology; D013997:Time Factors; D014783:Viscosity; D016474:Weight-Bearing / Q000502:physiology*