Transient Study of Couple Stress Effects in Compact Bone: Torsion

[+] Author and Article Information
J. F. C. Yang, R. S. Lakes

College of Engineering, University of Iowa, Iowa City, Iowa 52242

J Biomech Eng 103(4), 275-279 (Nov 01, 1981) (5 pages) doi:10.1115/1.3138292 History: Received March 17, 1981; Revised June 30, 1981; Online June 15, 2009


Couple stress theory, which admits an internal moment per unit area as well as the usual force per unit area, is a generalization of classical elasticity. Experimentally we have demonstrated the existence of couple stress by measuring the effect of size on apparent stiffness of compact bone in quasi-static torsion. From these measurements, we obtain the characteristic length for bone in couple stress theory.

Copyright © 1981 by ASME
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