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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
1. For a round shaft with a circumferential crack, as in Fig. 8.14, derive equations for (a) the fully plastic force Po, and (b) the fully plastic moment Mo. Express these as functions of crack length a, shaft radius b, and yield strength σo.

Figure 8.14
2. A circular shaft of 50 mm diameter is subjected to bending and contains a circumferential surface crack of depth a = 10 mm, as in Fig. 8.14. The shaft is made of the ASTM A517-F steel of Table 8.1. Estimate the bending moment M that will cause the shaft to fail.

Figure 8.14


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