STress intensity factors for complex-cracked pipes based on elastic finite element analyses

Jae Uk Jeong, Jae Boong Choi, Nam Su Huh, Yun Jae Kim

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

Abstract

A complex crack is one of severe crack that can occur at the dissimilar metal weld of nuclear piping. A relevant fracture mechanics assessment for a pipe with a complex crack has become interested in structural integrity of nuclear piping. A stress intensity factor is not only an important parameter in the linear elastic fracture mechanics to predict the stress state at the crack tip, but also one of variables to calculate the J-integral in the elastic plastic fracture mechanics. The accurate calculation of stress intensity factor is required for integrity assessment of nuclear piping system based on Leak-Before-Break concept. In the present paper, stress intensity factors of complexcracked pipes were calculated by using detailed 3-dimensional finite element analysis. As loading conditions, global bending, axial tension and internal pressure were considered. Based on the present FE works, the values of shape factors for stress intensity factor of complex-cracked pipes are suggested according to a variables change of complex crack geometries and pipes size. Furthermore, the closed-form expressions based on correction factor are newly suggested as a function of geometric variables. These new solutions can be used to Leak- Before-Break evaluation for complex-cracked pipes in the step of elastic J calculation.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791856994, 9780791856994, 9780791856994, 9780791856994
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes
EventASME 2015 Pressure Vessels and Piping Conference, PVP 2015 - Boston, United States
Duration: 2015 Jul 192015 Jul 23

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6A-2015
ISSN (Print)0277-027X

Conference

ConferenceASME 2015 Pressure Vessels and Piping Conference, PVP 2015
CountryUnited States
CityBoston
Period15/7/1915/7/23

Fingerprint

Stress intensity factors
Pipe
Fracture mechanics
Cracks
Dissimilar metals
Piping systems
Structural integrity
Crack tips
Welds
Plastics
Finite element method
Geometry

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Jeong, J. U., Choi, J. B., Huh, N. S., & Kim, Y. J. (2015). STress intensity factors for complex-cracked pipes based on elastic finite element analyses. In Materials and Fabrication (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 6A-2015). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP201545462

STress intensity factors for complex-cracked pipes based on elastic finite element analyses. / Jeong, Jae Uk; Choi, Jae Boong; Huh, Nam Su; Kim, Yun Jae.

Materials and Fabrication. American Society of Mechanical Engineers (ASME), 2015. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 6A-2015).

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

Jeong, JU, Choi, JB, Huh, NS & Kim, YJ 2015, STress intensity factors for complex-cracked pipes based on elastic finite element analyses. in Materials and Fabrication. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, vol. 6A-2015, American Society of Mechanical Engineers (ASME), ASME 2015 Pressure Vessels and Piping Conference, PVP 2015, Boston, United States, 15/7/19. https://doi.org/10.1115/PVP201545462
Jeong JU, Choi JB, Huh NS, Kim YJ. STress intensity factors for complex-cracked pipes based on elastic finite element analyses. In Materials and Fabrication. American Society of Mechanical Engineers (ASME). 2015. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP). https://doi.org/10.1115/PVP201545462
Jeong, Jae Uk ; Choi, Jae Boong ; Huh, Nam Su ; Kim, Yun Jae. / STress intensity factors for complex-cracked pipes based on elastic finite element analyses. Materials and Fabrication. American Society of Mechanical Engineers (ASME), 2015. (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP).
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