VERY LOW CYCLE FATIGUE EVALUATION OF PIPE ELBOW AND EXPERIMENTAL VALIDATIONS: I-QUASI-STATIC CYCLIC LOADING TEST

Jong Min Lee, Yun Jae Kim, Hyun Seok Song, Jin Weon Kim

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

Abstract

In this paper, pipe elbow under cyclic in-plane bending loads was evaluated using strain-based evaluation methods. For strain-based evaluation methods, acceptance criteria for local failure presented in ASME BPVC Sec. VIII and the void growth/shrinkage model were considered. The void growth/shrinkage model is evaluation model that incorporates the void growth effect to the acceptance criteria presented in ASME BPVC Sec. VIII. For the validation of evaluation models, predicted failure cycle of pipe elbow was compared with experimental results. The ASME BPVC Sec. VIII method gives very conservative results. The reason of this conservatism is that the void shrinkage effect under compressive loading is not considered. Therefore, the void growth/shrinkage model incorporating void shrinkage effect significantly improving evaluation results compared to result of ASME BPVC Sec. VIII, and crack initiation cycle can be predicted much closer but still smaller than the experimental result.

Original languageEnglish
Title of host publicationSeismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791887509
DOIs
Publication statusPublished - 2023
EventASME 2023 Pressure Vessels and Piping Conference, PVP 2023 - Atlanta, United States
Duration: 2023 Jul 162023 Jul 21

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume7
ISSN (Print)0277-027X

Conference

ConferenceASME 2023 Pressure Vessels and Piping Conference, PVP 2023
Country/TerritoryUnited States
CityAtlanta
Period23/7/1623/7/21

Bibliographical note

Publisher Copyright:
Copyright © 2023 by ASME.

Keywords

  • Finite element simulation
  • Pipe elbow
  • Quasi-static cyclic loading
  • Strain-based failure evaluation
  • Very low cycle fatigue evaluation

ASJC Scopus subject areas

  • Mechanical Engineering

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