Viscoelasticity of bone
From Wikipedia, the free encyclopedia
Viscoelasticity[1] is the phenomena of time-dependent strain exhibited by amorphous materials such as polymers or glasses. The viscoelasticity of materials depend on the viscosity and can be mechanically modeled using mechanical elements known as springs and dashpots. In turn, constitutive equations can relate the mechanical interpretation of viscoelasticity to the materials properties and strain rate.
[edit] Viscoelasticity in bone
Viscoelasticity in bone can arise from multiple factors related to structures on multiple lengthscales.[2] Bone is a composite of the biopolymer collagen and the bioceramic hydroxyapatite. Additionally the collagen is plied in various directions around the bone. Bone has two structural forms; corticle and cancellous.³
The viscoelasticity of bone can therefore arise from the void collapse and desification of cancellous bone and the natural viscoelastic response of collagen as a polymer.[2][3]
[edit] References
- ^ Meyers, and Chawla. Mechanical Behavior of Materials. Prentice Hall, Inc. (Pearson Education), 1999.
- ^ a b Garner, Elijah, Roderic Lakes, Taeyong Lee, Colby Swan, and Richard Brand. "Viscoelastic Dissipation in Compact Bone: Implications for Stres-Induced Fluid Flow in Bone." Transcations of the ASME 122 (2000): 166-172.
- ^ 3.051/BE.340 Lecture 20: Biomaterials for Organ Replacement. Cambridge, MA: Anne Mayes, 2006.
