3 Members in Bending

The characteristics of beams in bending operating in the creep range have been studied by many engineers and researchers. Theoretically, the analysis is based on the following Norton's relationship correlating stress and strain rate in the creep regime as discussed in Chapters 1 and 2 and as given by where k = constant n = creep exponent, which is a function of material property and temperature dε∕dT = strain rate σ = stress

This equation, however, is impractical to use for most problems encountered by the engineer as discussed in Section 2.1. A simpler method, referred to as the stationary stress or the elastic analog method, is normally used to solve beam bending problems and is given by