title: Quasi-linear viscoelastic characterization of human hip ligaments.
abstract: The object of this study was to develop a quasi-linear viscoelastic model for the iliofemoral and ischiofemoral hip ligaments. In order to accomplish this, a total of 56 axial tension tests were performed on 8 bone-ligament-bone specimens prepared from 4 fresh frozen male cadavers. Each specimen went through a battery of 7 tests including a series of step-and-hold tests and load-and-unload ramp tests. The bone-ligament-bone specimens were situated so that the load from a servo-hydraulic Material Testing System would be applied on the long axis of each ligament. The reduced relaxation data was fit to a two exponential damping function while the instantaneous elastic response was fit to a power-law function. These two constituents were then combined to create a single constitutive equation for each ligament. The quasi-linear viscoelastic model presented in this study can be used to improve the biofidelity of computational models of the human hip.
authors.affiliation: Virginia Tech-Wake Forest Center for Impact Biomechanics, Blacksburg, VA, USA.
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Kemper
authors.forename: Craig
authors.initials: C
authors.lastname: McNally
authors.forename: Byron
authors.initials: B
authors.lastname: Smith
authors.forename: Stefan M
authors.initials: SM
authors.lastname: Duma
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002102:Cadaver; D003198:Computer Simulation; D004548:Elasticity; D006621:Hip Joint / Q000502:physiology*; D006801:Humans; D066298:In Vitro Techniques; D008023:Ligaments, Articular / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D015233:Models, Statistical; D013314:Stress, Mechanical; D014783:Viscosity