Microcracking in dog bone under load. A biomechanical study of bone visco-elasticity.
Entire diaphyseal bones from adult dogs were repeatedly loaded in torsion. The residual deformation after unloading from the non-linear deformation range was found to decrease with time. Acoustic-emission signals typical for micro-cracking were registered not only during loading in the non-linear deformation range but also during the initial phase of the following unloading. The initial torque and twist required for further micro-cracking decreased for every subsequent load-cycle, i.e. with the amount of cracking already formed. These observations are indications of visco-elastic properties of bone material.
D000818:Animals; D001696:Biomechanical Phenomena; D001842:Bone and Bones / Q000502:physiology*; D004285:Dogs; D005260:Female; D005264:Femoral Fractures / Q000473:pathology; D005269:Femur / Q000502:physiology; D008297:Male; D013314:Stress, Mechanical; D013977:Tibia / Q000502:physiology; D013978:Tibial Fractures / Q000473:pathology