Fracture mechanics parameters for compact bone:​ effects of density and specimen thickness

Wright, T. M.<sup>1</sup>; Hayes, W. C.<sup>2</sup>

Affiliations

¹Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, U.S.A.

²Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, U.S.A.

Abstract and keywords

Linear elastic fracture mechanics was used to study longitudinal crack propagation in bovine compact bone. The resistance to crack initiation in slotted specimens was examined by measuring both the critical stress intensity factor, K_c, and the critical strain energy release rate, G_c. A change in specimen thickness (from 0.185 to 0.380 cm) did not affect the value of K_c (or G_c). A significant positive correlation (P < 0.01) was found between K_c (or G_c) and dry density. A comparison of the experimentally determined effective modulus (relating K_c and G_c) with an effective modulus calculated from the transversely isotropic model for bone showed good agreement.

Keywords:

Links

DOI: 10.1016/0021-9290(77)90019-7

PubMed: 885894

WoS: A1977DQ42000006

History

Received: 1976-07-30

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