STUDIES ON ONSET OF RATCHETING IN PIPE BENDS AND EFFECT OF THICKNESS ON STRAIN ACCUMULATION

摘要

This paper intends to provide an overview of various possibilities of ratcheting in pipelines subjected to cyclic thermal and mechanical loadings. The present work deals with review on results from the studies of research papers providing experimental data and analytical study on ratcheting. There has been no well-defined material model and analysis procedure to predict this phenomenon accurately. An analysis carried out on 2-inch NPS SS304 pipe bends with different thickness (Schedule 40 and Schedule 80) using ABAQUS, non-linear FEA software to predict the strain accumulation and their influences on ratcheting failure is presented. The results and their inferences are included.