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Unformatted text preview: 0. Finally, Example 6.2 assumes that there is no axial stress due to the pressure. This is unusual, but it is physically possible, for example if the pressure vessel is a torus. 4. The three principal stresses are (-30, -40, -50) Mpa, and the yield stress for a ductile material is 100Mpa. Derive or find (another textbook, internet) the equation for the 3D Von-Mises criterion and use it to calculate the safety factor. Compare to the safety factor you get from the Tresca criterion....
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- Fall '09