Elastic-Plastic J-Estimation for circumferentially cracked pipes under combined mechanical and thermal loadings

Chang Young Oh; Yun Jae Kim; R. A. Ainsworth

doi:10.1115/PVP2013-98129

Elastic-Plastic J-Estimation for circumferentially cracked pipes under combined mechanical and thermal loadings

Chang Young Oh, Yun Jae Kim, R. A. Ainsworth

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper addresses load order effects on elastic-plastic J estimation under combined mechanical and thermal loads for circumferentially cracked pipes. The load order effects, for various thermal gradient types and mechanical loading, are evaluated for a range of magnitudes of the loadings, crack sizes and material hardening. Variations of elastic-plastic J obtained by finite element analysis are compared with existing and proposed methods for use with the R6 defect assessment procedure. The load order effects are presented on the R6 failure assessment diagram (FAD) by calculating the two parameters Kr and Lr from the finite element results. It is shown that there are significant load order effects at large secondary stress cases but these are successfully treated by simplified methods proposed for use with R6.

Original language	English
Title of host publication	ASME 2013 Pressure Vessels and Piping Conference, PVP 2013
DOIs	https://doi.org/10.1115/PVP2013-98129
Publication status	Published - 2013 Dec 1
Externally published	Yes
Event	ASME 2013 Pressure Vessels and Piping Conference, PVP 2013 - Paris, France Duration: 2013 Jul 14 → 2013 Jul 18

Publication series

Name	American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume	1 A
ISSN (Print)	0277-027X

Conference

Conference	ASME 2013 Pressure Vessels and Piping Conference, PVP 2013
Country/Territory	France
City	Paris
Period	13/7/14 → 13/7/18

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.1115/PVP2013-98129

Cite this

Oh, C. Y., Kim, Y. J., & Ainsworth, R. A. (2013). Elastic-Plastic J-Estimation for circumferentially cracked pipes under combined mechanical and thermal loadings. In ASME 2013 Pressure Vessels and Piping Conference, PVP 2013 (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1 A). https://doi.org/10.1115/PVP2013-98129

Elastic-Plastic J-Estimation for circumferentially cracked pipes under combined mechanical and thermal loadings. / Oh, Chang Young; Kim, Yun Jae; Ainsworth, R. A.
ASME 2013 Pressure Vessels and Piping Conference, PVP 2013. 2013. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 1 A).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Oh, CY, Kim, YJ & Ainsworth, RA 2013, Elastic-Plastic J-Estimation for circumferentially cracked pipes under combined mechanical and thermal loadings. in ASME 2013 Pressure Vessels and Piping Conference, PVP 2013. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 1 A, ASME 2013 Pressure Vessels and Piping Conference, PVP 2013, Paris, France, 13/7/14. https://doi.org/10.1115/PVP2013-98129

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abstract = "This paper addresses load order effects on elastic-plastic J estimation under combined mechanical and thermal loads for circumferentially cracked pipes. The load order effects, for various thermal gradient types and mechanical loading, are evaluated for a range of magnitudes of the loadings, crack sizes and material hardening. Variations of elastic-plastic J obtained by finite element analysis are compared with existing and proposed methods for use with the R6 defect assessment procedure. The load order effects are presented on the R6 failure assessment diagram (FAD) by calculating the two parameters Kr and Lr from the finite element results. It is shown that there are significant load order effects at large secondary stress cases but these are successfully treated by simplified methods proposed for use with R6.",

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AB - This paper addresses load order effects on elastic-plastic J estimation under combined mechanical and thermal loads for circumferentially cracked pipes. The load order effects, for various thermal gradient types and mechanical loading, are evaluated for a range of magnitudes of the loadings, crack sizes and material hardening. Variations of elastic-plastic J obtained by finite element analysis are compared with existing and proposed methods for use with the R6 defect assessment procedure. The load order effects are presented on the R6 failure assessment diagram (FAD) by calculating the two parameters Kr and Lr from the finite element results. It is shown that there are significant load order effects at large secondary stress cases but these are successfully treated by simplified methods proposed for use with R6.

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Elastic-Plastic J-Estimation for circumferentially cracked pipes under combined mechanical and thermal loadings

Abstract

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