title: Microdamage accumulation in bovine trabecular bone in uniaxial compression.
abstract: In this study we investigated how microdamage accumulated with increasing compressive strain in bovine trabecular bone. We found that little damage is created in the linear elastic region, up to -0.4 percent strain. At an average strain of -0.76 percent +/-0.25 percent, the stress-strain curve became nonlinear, and peaked at -1.91 percent +/-0.55 percent strain. Microdamage increases rapidly during the peak of the stress-strain curve, and a localized band of damage formed. At strains beyond the ultimate strain, the damaged band widened and the density of damage within the band increased. Microdamage occurred as groupings of cracks; the majority of damage occurred as regions of cross-hatching. All microdamage parameters increased with increasing maximum compressive strain. We also observed exponential relationships between crack numerical density and damage (1(o) - (o)Esec/E0) and between crack length density and damage.
authors.affiliation: Division of Health Sciences and Technology, Harvard Medical School-Massachusetts Institute of Technology, Cambridge 02139, USA. tarthur@mit.edu
authors.forename: T L
authors.initials: TL
authors.lastname: Arthur Moore
authors.forename: L J
authors.initials: LJ
authors.lastname: Gibson
mesh_terms: D000818:Animals; D001842:Bone and Bones / Q000293:injuries* / Q000473:pathology / Q000503:physiopathology*; D002417:Cattle; D019245:Compressive Strength / Q000502:physiology; D004548:Elasticity; D015775:Fractures, Stress / Q000473:pathology* / Q000503:physiopathology*; D007091:Image Processing, Computer-Assisted; D008856:Microscopy, Fluorescence / Q000379:methods; D008860:Microscopy, Ultraviolet / Q000379:methods; D012680:Sensitivity and Specificity; D013314:Stress, Mechanical; D013977:Tibia / Q000293:injuries / Q000473:pathology / Q000503:physiopathology; D016474:Weight-Bearing / Q000502:physiology