Ratcheting Boundary Analysis of Straight and Elbow Piping

Abstract:

The ratcheting strains of the straight and elbow piping under two kinds of loads—pressurized piping under symmetric cyclic bending and pulsating cyclic pressure were analyzed based on Chaboche constitutive model. The locations of the maximum ratcheting strain were determined. The ratcheting boundaries of the two piping structures under two kinds of loads were compared and calculated by the C-TDF method. For the pressurized piping under symmetric cyclic bending, the allowable bending load increases from E90S to E90L under the same pressure. In the higher cyclic pressure range, the allowable pressure have little difference under the same bending load which indicates that the bend moment have a bit effects on the ratcheting boundary in the higher cyclic pressure range.

• Periodical: Advanced Materials Research (Volumes 118-120)
• Pages: 131-135
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.118-120.131
• Online since: June 2010
• Authors: Ting Liang*, Gang Chen, Qi Zhang, Xu Chen
• Keywords: Elbow Piping, Finite Element Analysis (FEA), Piping, Ratcheting Boundary, Ratcheting Effect

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