Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches

Yu Yao Lin; Jin Ha Hwang; Nak Kyun Cho; Kyu Sik Park; Xing Ya Feng; Binbin Li; Do Kyun Kim

Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches

Yu Yao Lin
, Jin Ha Hwang
, Nak Kyun Cho
, Kyu Sik Park
, Xing Ya Feng
, Binbin Li
, Do Kyun Kim

Dept. of Manufacturing Systems and Design Engineering

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

Abstract

With the increasing demand for decarbonization, the safety assessment of CO2-carrying vessels has gained significant attention. The presence of cracks can significantly shorten the service life of structures, and unexpected crack growth could lead to serious consequences. Material fracture toughness is a critical property for assessing crack stability. Due to stress concentration, cracks often occur in welded regions. In this study, the fracture toughness of FH36 steel is measured through the crack tip opening displacement (CTOD) test using the Heat-Affected Zone (HAZ) specimen. The testing process is also simulated using the finite element method, where the stress-modified fracture strain (SMFS) model is employed to account for damage. The relationship between stress triaxiality and fracture strain for the material is determined from the experimental data. The obtained fracture toughness and damage models will contribute to future safety assessments.

Original language	English
Title of host publication	Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025
Editors	Jin S. Chung, Shiqiang Yan, Igor Buzin, Ivana Kubat, Frank K Lim, Bor-Feng Peng, Ali Reza, Suak Ho Van, Decheng Wan, Satoru Yamaguchi
Publisher	International Society of Offshore and Polar Engineers
Pages	4203-4210
Number of pages	8
ISBN (Print)	9781880653746
State	Published - 2025
Event	35th Annual International Ocean and Polar Engineering Conference, ISOPE 2025 - Seoul/Goyang, Korea, Republic of Duration: 1 Jun 2025 → 6 Jun 2025

Publication series

Name	Proceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)	1098-6189
ISSN (Electronic)	1555-1792

Conference

Conference	35th Annual International Ocean and Polar Engineering Conference, ISOPE 2025
Country/Territory	Korea, Republic of
City	Seoul/Goyang
Period	1/06/25 → 6/06/25

Keywords

fatigue crack
fracture strain
Fracture toughness
heat-affected zone
residual stress
stress triaxiality

Cite this

Lin, Y. Y., Hwang, J. H., Cho, N. K., Park, K. S., Feng, X. Y., Li, B., & Kim, D. K. (2025). Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches. In J. S. Chung, S. Yan, I. Buzin, I. Kubat, F. K. Lim, B.-F. Peng, A. Reza, S. H. Van, D. Wan, & S. Yamaguchi (Eds.), Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025 (pp. 4203-4210). (Proceedings of the International Offshore and Polar Engineering Conference). International Society of Offshore and Polar Engineers.

Lin, Yu Yao ; Hwang, Jin Ha ; Cho, Nak Kyun et al. / Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches. Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025. editor / Jin S. Chung ; Shiqiang Yan ; Igor Buzin ; Ivana Kubat ; Frank K Lim ; Bor-Feng Peng ; Ali Reza ; Suak Ho Van ; Decheng Wan ; Satoru Yamaguchi. International Society of Offshore and Polar Engineers, 2025. pp. 4203-4210 (Proceedings of the International Offshore and Polar Engineering Conference).

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title = "Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches",

abstract = "With the increasing demand for decarbonization, the safety assessment of CO2-carrying vessels has gained significant attention. The presence of cracks can significantly shorten the service life of structures, and unexpected crack growth could lead to serious consequences. Material fracture toughness is a critical property for assessing crack stability. Due to stress concentration, cracks often occur in welded regions. In this study, the fracture toughness of FH36 steel is measured through the crack tip opening displacement (CTOD) test using the Heat-Affected Zone (HAZ) specimen. The testing process is also simulated using the finite element method, where the stress-modified fracture strain (SMFS) model is employed to account for damage. The relationship between stress triaxiality and fracture strain for the material is determined from the experimental data. The obtained fracture toughness and damage models will contribute to future safety assessments.",

keywords = "fatigue crack, fracture strain, Fracture toughness, heat-affected zone, residual stress, stress triaxiality",

author = "Lin, \{Yu Yao\} and Hwang, \{Jin Ha\} and Cho, \{Nak Kyun\} and Park, \{Kyu Sik\} and Feng, \{Xing Ya\} and Binbin Li and Kim, \{Do Kyun\}",

note = "Publisher Copyright: {\textcopyright} 2025 by the International Society of Offshore and Polar Engineers (ISOPE).; 35th Annual International Ocean and Polar Engineering Conference, ISOPE 2025 ; Conference date: 01-06-2025 Through 06-06-2025",

year = "2025",

language = "English",

isbn = "9781880653746",

series = "Proceedings of the International Offshore and Polar Engineering Conference",

publisher = "International Society of Offshore and Polar Engineers",

pages = "4203--4210",

editor = "Chung, \{Jin S.\} and Shiqiang Yan and Igor Buzin and Ivana Kubat and Lim, \{Frank K\} and Bor-Feng Peng and Ali Reza and Van, \{Suak Ho\} and Decheng Wan and Satoru Yamaguchi",

booktitle = "Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025",

}

Lin, YY, Hwang, JH, Cho, NK, Park, KS, Feng, XY, Li, B & Kim, DK 2025, Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches. in JS Chung, S Yan, I Buzin, I Kubat, FK Lim, B-F Peng, A Reza, SH Van, D Wan & S Yamaguchi (eds), Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025. Proceedings of the International Offshore and Polar Engineering Conference, International Society of Offshore and Polar Engineers, pp. 4203-4210, 35th Annual International Ocean and Polar Engineering Conference, ISOPE 2025, Seoul/Goyang, Korea, Republic of, 1/06/25.

Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches. / Lin, Yu Yao; Hwang, Jin Ha; Cho, Nak Kyun et al.
Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025. ed. / Jin S. Chung; Shiqiang Yan; Igor Buzin; Ivana Kubat; Frank K Lim; Bor-Feng Peng; Ali Reza; Suak Ho Van; Decheng Wan; Satoru Yamaguchi. International Society of Offshore and Polar Engineers, 2025. p. 4203-4210 (Proceedings of the International Offshore and Polar Engineering Conference).

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

TY - GEN

T1 - Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches

AU - Lin, Yu Yao

AU - Hwang, Jin Ha

AU - Cho, Nak Kyun

AU - Park, Kyu Sik

AU - Feng, Xing Ya

AU - Li, Binbin

AU - Kim, Do Kyun

PY - 2025

Y1 - 2025

N2 - With the increasing demand for decarbonization, the safety assessment of CO2-carrying vessels has gained significant attention. The presence of cracks can significantly shorten the service life of structures, and unexpected crack growth could lead to serious consequences. Material fracture toughness is a critical property for assessing crack stability. Due to stress concentration, cracks often occur in welded regions. In this study, the fracture toughness of FH36 steel is measured through the crack tip opening displacement (CTOD) test using the Heat-Affected Zone (HAZ) specimen. The testing process is also simulated using the finite element method, where the stress-modified fracture strain (SMFS) model is employed to account for damage. The relationship between stress triaxiality and fracture strain for the material is determined from the experimental data. The obtained fracture toughness and damage models will contribute to future safety assessments.

AB - With the increasing demand for decarbonization, the safety assessment of CO2-carrying vessels has gained significant attention. The presence of cracks can significantly shorten the service life of structures, and unexpected crack growth could lead to serious consequences. Material fracture toughness is a critical property for assessing crack stability. Due to stress concentration, cracks often occur in welded regions. In this study, the fracture toughness of FH36 steel is measured through the crack tip opening displacement (CTOD) test using the Heat-Affected Zone (HAZ) specimen. The testing process is also simulated using the finite element method, where the stress-modified fracture strain (SMFS) model is employed to account for damage. The relationship between stress triaxiality and fracture strain for the material is determined from the experimental data. The obtained fracture toughness and damage models will contribute to future safety assessments.

KW - fatigue crack

KW - fracture strain

KW - Fracture toughness

KW - heat-affected zone

KW - residual stress

KW - stress triaxiality

UR - https://www.scopus.com/pages/publications/105026280470

M3 - Conference contribution

AN - SCOPUS:105026280470

SN - 9781880653746

T3 - Proceedings of the International Offshore and Polar Engineering Conference

SP - 4203

EP - 4210

BT - Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025

A2 - Chung, Jin S.

A2 - Yan, Shiqiang

A2 - Buzin, Igor

A2 - Kubat, Ivana

A2 - Lim, Frank K

A2 - Peng, Bor-Feng

A2 - Reza, Ali

A2 - Van, Suak Ho

A2 - Wan, Decheng

A2 - Yamaguchi, Satoru

PB - International Society of Offshore and Polar Engineers

T2 - 35th Annual International Ocean and Polar Engineering Conference, ISOPE 2025

Y2 - 1 June 2025 through 6 June 2025

ER -

Lin YY, Hwang JH, Cho NK, Park KS, Feng XY, Li B et al. Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches. In Chung JS, Yan S, Buzin I, Kubat I, Lim FK, Peng BF, Reza A, Van SH, Wan D, Yamaguchi S, editors, Proceedings of the 35th International Ocean and Polar Engineering Conference, 2025. International Society of Offshore and Polar Engineers. 2025. p. 4203-4210. (Proceedings of the International Offshore and Polar Engineering Conference).

Investigation on the Toughness for FH36 Steel HAZ Specimen through Simulative Approaches

Abstract

Publication series

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Keywords

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