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J Biomech. 1990;23(4):349-52.

Errors in the orientation of the principal stress axes if bone tissue is modeled as isotropic.

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  • 1Department of Mechanical Engineering, City College, City University of New York, NY 10031.


The error in the prediction of the orientation of the principal axes of stress in bone tissue is determined in the case when the tissue is modeled as elastically isotropic rather than as orthotropic, the probable symmetry of bone tissue. Results are two-dimensional and assume the same underlying strain state for both the orthotropic and isotropic cases. The maximum error is 45 degrees, and the typical error is generally significant.

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