Open AccessEffect of Shape Imperfections on Collapse Moment of Strain Hardened Pipe Bends under in-plane Opening Bending Moment
Author(s) -
M. Suneel Kumar,
T. Christo Michael
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1128/1/012039
Subject(s) - ovality , bending moment , moment (physics) , structural engineering , materials science , bending , finite element method , mechanics , composite material , engineering , physics , classical mechanics
The effect of ovality and variable wall thickness on the collapse load of pipe bends subjected to in-plane opening moment is investigated using Finite Element (FE) analysis for an elastic plastic material. The collapse load was estimated from the moment-rotation curves using Twice-Elastic-Slope method. The presence of ovality reduced the collapse load by 13.1% for a model having bend characteristic 0.1, thus making its effect critical. The presence of thinning had no significant effect on the collapse load. Based on the FE results, a mathematical equation is proposed to estimate the collapse load of strain-hardened pipe bends for a range of bend characteristic from 0.1 to 0.6, considering the effect of ovality.