Lattice strains and load partitioning in bovine trabecular bone.
Microdamage and failure mechanisms have been well characterized in bovine trabecular bone. However, little is known about how elastic strains develop in the apatite crystals of the trabecular struts and their relationship with different deformation mechanisms. In this study, wide-angle high-energy synchrotron X-ray diffraction has been used to determine bulk elastic strains under in situ compression. Dehydrated bone is compared to hydrated bone in terms of their response to load. During compression, load is initially borne by trabeculae aligned parallel to loading direction with non-parallel trabeculae deforming by bending. Ineffective load partitioning is noted in dehydrated bone whereas hydrated bone behaves like a plastically yielding foam.
School of Materials, Manchester Materials Science Centre, The University of Manchester, Grosvenor Street, Manchester M1 7HS, UK. riaz.akhtar@manchester.ac.uk
R
R
Akhtar
M R
MR
Daymond
J D
JD
Almer
P M
PM
Mummery
D000818:Animals; D001031:Apatites / Q000494:pharmacology; D001842:Bone and Bones / Q000187:drug effects / Q000502:physiology* / Q000528:radiation effects; D002417:Cattle; D019245:Compressive Strength / Q000187:drug effects / Q000528:radiation effects; D003460:Crystallization; D004548:Elasticity / Q000187:drug effects / Q000528:radiation effects; D013314:Stress, Mechanical; D014867:Water / Q000502:physiology; D016474:Weight-Bearing / Q000502:physiology; D014961:X-Ray Diffraction; D014965:X-Rays
D001031:Apatites; D014867:Water