title: Fracture and material degradation properties of cortical bone under accelerated stress.
abstract: The fracture stress and material property degradation of bovine cortical bone specimens were investigated experimentally under accelerated cyclic tensile stress testing. The fracture stress of a typical specimen was found from a static tensile test, and the cyclic loading/unloading was calculated as a percentage of this fracture stress. The results of accelerated cyclic stress tests were compared to monotonically increased static tests to determine if loading/unloading has an effect on the damage mechanism in bone. It was found that fracture stress of the bone increases due to accelerated stress cycling whereas the modulus decreases in a logarithmic fashion with increasing cyclic stress.
authors.affiliation: Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University and Purdue University at Indianapolis (IUPUI) 46202, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Pidaparti
authors.forename: B A
authors.initials: BA
authors.lastname: Merril
authors.forename: N A
authors.initials: NA
authors.lastname: Downton
mesh_terms: D000818:Animals; D001842:Bone and Bones; D002417:Cattle; D050723:Fractures, Bone; D008422:Materials Testing; D013314:Stress, Mechanical