title: Stress relaxation behaviour of trabecular bone specimens.
abstract: The present study defines several conditions under which stress relaxation tests can be performed and investigates the viscoelastic behaviour of trabecular bone in compression through a series of stress relaxation tests at three strain levels and in three loading directions of each cubic specimen. A viscoelastic model is proposed to characterize the behaviour of trabecular bone and a spectrum of relaxation times is determined. Trabecular bone from the femoral head is non-linearly viscoelastic and displays anisotropic behaviour, which cannot be more symmetric elastically than orthotropic.
authors: Department of Mechanical Engineering, University of Patras, Rion, Greece.
authors: D D
authors: DD
authors: Deligianni
authors: A
authors: A
authors: Maris
authors: Y F
authors: YF
authors: Missirlis
mesh_terms: D000368:Aged; D001842:Bone and Bones / Q000502:physiology*; D004548:Elasticity; D005260:Female; D005270:Femur Head; D006801:Humans; D008297:Male; D008875:Middle Aged; D008954:Models, Biological; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D013997:Time Factors; D014783:Viscosity; D016474:Weight-Bearing