Abstract
Effect of wall-thinning dimensions on the strength of piping elbows against internal pressure and in-plane bending was examined through the finite element analysis considering material nonlinearity and geometrical nonlinearity. The pipe used for simulation was MS SMTP370 80A Sch160. Assuming the wall-thinning area was fixed to relatively narrow area, the effect of depth and position of wall-thinning was investigated. The capped elbow specimen was first subjected to a constant internal pressure, and second subjected to the close-mode in-plane bending until the prescribed displacement The maximum load was defmed as the collapse load. From the simulation results, we found that the effect of relatively narrow wall-thinning on the collapse load was small under the internal pressure and close-mode in-plane bending.
