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7t2d4 16Â2

16A2

D 2r with D = diameter of the largest inscribed circle, r = radius of curvature of boundary at selected position (positive),

A = cross-sectional area of section,

Largest inscribed circle

Fig. 5.5. Inscribed circle stress evaluation procedure.

or, for negative curvatures (concave or re-entrant boundaries):

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