Page 332 - Mechanical Behavior of Materials
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Problems and Questions 333
(b) If only the torsion is applied, that is P = 0, is the safety factor requirement met? If
not, what minimum value of compressive force P must be applied to satisfy the safety
factor?
7.56 A thick-walled tube has inner and outer radii of 30 and 50 mm, respectively, and it is made of
the gray cast iron of Table 7.1.
(a) What is the safety factor against fracture for an internal pressure of 20 MPa?
(b) What is the safety factor against fracture if a compressive axial force of 700 kN is
applied, in addition to the internal pressure in part (a)?
