Effect of yield strength to elastic modulus ratio on finite element based plastic loads for elbows under bending

Kuk Hee Lee, Yun-Jae Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper quantifies the effect of the yield strength-toelastic modulus ratio (yield strain) on plastic loads (defined by the twice-elastic-slope according to the ASME code) for 90° elbows under in-plane and out-of-plane bending. Results are based on exten sive and systematic FE limit analyses assuming elastic-perfectly plastic materials. Based on FE results, a simple approximation of plastic loads of pipe bends, incorporating the yield strength-to-elastic modulus ratio effect, is proposed. To validate the proposed approximation, predicted plastic moments are compared with published full-scale pipe test data, showing that the proposed approximation gives overall lower than the FE results and clo se to experimental values.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Pages315-324
Number of pages10
Volume5
DOIs
Publication statusPublished - 2008 Dec 1
EventASME 2008 Pressure Vessels and Piping Conference, PVP2008 - Chicago, IL, United States
Duration: 2008 Jul 272008 Jul 31

Other

OtherASME 2008 Pressure Vessels and Piping Conference, PVP2008
CountryUnited States
CityChicago, IL
Period08/7/2708/7/31

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ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Lee, K. H., & Kim, Y-J. (2008). Effect of yield strength to elastic modulus ratio on finite element based plastic loads for elbows under bending. In American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP (Vol. 5, pp. 315-324) https://doi.org/10.1115/PVP2008-61775