Application of stress-modified fracture strain model to full-scale pipes with a circumferential crack in the center of welds

Ho Wan Ryu, Hyun Woo Jung, Hune Tae Kim, Yun Jae Kim

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

Abstract

A lot of welded joints are required to connect the junctions of components in the complex piping system. The structural integrity assessment on welded pipes is especially important, because the weldments are susceptible to material discontinuities, flaws and residual stresses. Finite element (FE) damage analysis can be useful and effective method for an accurate assessment on extensive structures. For the case of welded joint, the numerical method is necessarily required to assess complex features because of material discontinuities and flaws. This study provides a simple numerical method to simulate ductile tearing in welded full-scale pipes. Stressmodified fracture strain model is applied to finite element analysis with a stress reduction technique. An element-sizedependent critical damage model is also implemented in the fullscale pipe simulations. From the results of simulation, deformation response and characteristic loads are compared with experimentally measured values to verify the application of damage model on weld material. As a result, the predictions of finite element damage analysis are in good agreement with experiments.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791850428
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes
EventASME 2016 Pressure Vessels and Piping Conference, PVP 2016 - Vancouver, Canada
Duration: 2016 Jul 172016 Jul 21

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6A-2016
ISSN (Print)0277-027X

Conference

ConferenceASME 2016 Pressure Vessels and Piping Conference, PVP 2016
CountryCanada
CityVancouver
Period16/7/1716/7/21

ASJC Scopus subject areas

  • Mechanical Engineering

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  • Cite this

    Ryu, H. W., Jung, H. W., Kim, H. T., & Kim, Y. J. (2016). Application of stress-modified fracture strain model to full-scale pipes with a circumferential crack in the center of welds. In Materials and Fabrication (American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP; Vol. 6A-2016). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/PVP2016-63546