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Slide 7 The exact analysis of the bone is quite involved and should incorporate the actual shape and dimensions of the bone including its lengthwise variations. Although researchers are working on such approaches, biomedical scientists often take a somewhat simpler approach. In this approach, variations of the cross section along the length of the bone are ignored. To further simplify the analysis, an equivalent circular cross section is defined. The outer radius of this equivalent section is the average of the major and minor radii. The inner radius is found by subtracting off the average thickness from the outer radius. The cross sectional area and polar moment of inertia are found by using the standard formulae for circular cross sections. |
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