Evaluations of ductile and cleavage fracture using coupled GTN and Beremin model in API X70 pipelines steel

Youn Young Jang, Ji Hee Moon, Nam Su Huh, Ki Seok Kim, Woo Yeon Cho, Myeong Woo Lee, Yun Jae Kim

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

Abstract

This paper is aimed to characterize ductile and cleavage fracture behavior of API X70 pipeline steel and investigate applicability of a micro-damage mechanics model to simulate static and dynamic crack propagation of single-edge notched tension (SENT) and drop-weight tear test (DWTT) specimens, as well as a local approach to describe cleavage fracture behavior. Gurson-Tvergaard-Needleman (GTN) model was applied to simulate ductile fracture behavior of SENT and DWTT specimens, where GTN model has been widely known for well-established model to characterize micro-damage process of void nucleation, growth and coalescence. As for a local approach, Beremin model was considered to estimate probability of cleavage fracture. In this regard, this study was especially focused on abnormal fracture appearance of DWTT specimen. In the present study, firstly, experiment data from tensile specimen test was used to obtain plastic flow curve (i.e. stress and strain curve). And load-CMOD and J-integral/CTOD resistance curves obtained from SENT test were used to characterize static ductile fracture and calibrate GTN model parameters for X70 pipeline steel. And the calibrated GTN model parameters were verified by comparing experiment data from DWTT test such as load-displacement and crack length-time curves with those from FE analysis. To accommodate dynamic effect on material properties, rate-dependent stress-strain curves were considered in FE analyses. To describe cleavage fracture, the Weibull stress was calculated from FE analyses of DWTT and Weibull parameters were calibrated by comparing with probability distribution of cleavage fracture from experiment data of DWTT specimen. Using Weibull parameters, the whole of cleavage fracture probability can be estimated as ductile shear area of DWTT specimen increases.

Original languageEnglish
Title of host publicationMaterials Technology
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858790
DOIs
Publication statusPublished - 2019 Jan 1
Externally publishedYes
EventASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019 - Glasgow, United Kingdom
Duration: 2019 Jun 92019 Jun 14

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume4

Conference

ConferenceASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019
CountryUnited Kingdom
CityGlasgow
Period19/6/919/6/14

Fingerprint

Application programming interfaces (API)
Pipelines
Steel
Ductile fracture
Experiments
Stress-strain curves
Coalescence
Plastic flow
Probability distributions
Crack propagation
Loads (forces)
Materials properties
Mechanics
Nucleation
Cracks

ASJC Scopus subject areas

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

Cite this

Jang, Y. Y., Moon, J. H., Huh, N. S., Kim, K. S., Cho, W. Y., Lee, M. W., & Kim, Y. J. (2019). Evaluations of ductile and cleavage fracture using coupled GTN and Beremin model in API X70 pipelines steel. In Materials Technology [V004T03A037] (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 4). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2019-96483

Evaluations of ductile and cleavage fracture using coupled GTN and Beremin model in API X70 pipelines steel. / Jang, Youn Young; Moon, Ji Hee; Huh, Nam Su; Kim, Ki Seok; Cho, Woo Yeon; Lee, Myeong Woo; Kim, Yun Jae.

Materials Technology. American Society of Mechanical Engineers (ASME), 2019. V004T03A037 (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 4).

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

Jang, YY, Moon, JH, Huh, NS, Kim, KS, Cho, WY, Lee, MW & Kim, YJ 2019, Evaluations of ductile and cleavage fracture using coupled GTN and Beremin model in API X70 pipelines steel. in Materials Technology., V004T03A037, Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, vol. 4, American Society of Mechanical Engineers (ASME), ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2019, Glasgow, United Kingdom, 19/6/9. https://doi.org/10.1115/OMAE2019-96483
Jang YY, Moon JH, Huh NS, Kim KS, Cho WY, Lee MW et al. Evaluations of ductile and cleavage fracture using coupled GTN and Beremin model in API X70 pipelines steel. In Materials Technology. American Society of Mechanical Engineers (ASME). 2019. V004T03A037. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE). https://doi.org/10.1115/OMAE2019-96483
Jang, Youn Young ; Moon, Ji Hee ; Huh, Nam Su ; Kim, Ki Seok ; Cho, Woo Yeon ; Lee, Myeong Woo ; Kim, Yun Jae. / Evaluations of ductile and cleavage fracture using coupled GTN and Beremin model in API X70 pipelines steel. Materials Technology. American Society of Mechanical Engineers (ASME), 2019. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE).
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