On Some Geometric Properties of Human Ribs. 1
Abstract
The cross-sectional geometric properties of ribs 1 through 8 of a medium-framed female cadaver specimen were studied. Specifically, each rib was cut into 10 sections, the exposed cross-sections photographed, a finite element grid superimposed, and with the aid of a digital computer, the geometric properties (total area, compact bone area, centroid, principal axes, principal moments of inertia and torsional constant) of the compact bone region were determined. Although most of these quantities exhibit wide variations some trends do emerge. Of particular significance is a simple geometric construction for the location of the centroid and principal axes and the general result that a thin-walled ellipse is a reasonably accurate model from which the approximate cross-sectional properties may be calculated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1971
- Accession Number
- AD0740450
Entities
People
- Ping Heng Chen
- Sanford B. Roberts
Organizations
- Air Force Research Laboratory