MSE 3020 Study Guide - Quiz Guide: Cylinder Stress, Stress (Mechanics)

• School: UConn
• Department: Materials Science and Engineering
• Course: MSE 3020
• Professor: Daniel Goberman

Document Summary

Hw 6: hoop stress is defined as: Using this formula, we obtain: hoop = (cid:4666)(cid:2869)(cid:2868)(cid:2868)(cid:2868) (cid:4667)(cid:4666)(cid:2869)(cid:2868)(cid:2868) (cid:4667) The strain in the longitudinal direction is given as: The middle will cancel, making the left hand side completely zero. (aka, 25,000 (1/2. 50,000) = 0: i believe this is what you call a bending stress which occurs as a result of ovalization, ovalization results in a bending stress in addition to the hoop stress. Ovalization occurs at tube bends with attendant pipe wall thickening at the inner radius and thinning at the outer radius. During creep, the pipe expands and the wall becomes thinner. Creep extension in the narrow portion of a weld can lag the creep extension in wider parts of a weld. This increases tensile stress in the narrow portion of a weld: we have: From figures 5 to 9, for udimet 700, the sress which corresponds to the 100 hour rupture life at 870 degrees celcius is 276 mpa.