Numerical Simulation of Thermal Ageing Effect on Fracture Behavior for CF8A Cast Stainless Steels under Very Low Cyclic Loading Conditions

Gyo Geun Youn; Hyun Suk Nam; Yun Jae Kim; Jin Won Kim

doi:10.1016/j.prostr.2018.12.274

Numerical Simulation of Thermal Ageing Effect on Fracture Behavior for CF8A Cast Stainless Steels under Very Low Cyclic Loading Conditions

Gyo Geun Youn, Hyun Suk Nam, Yun Jae Kim, Jin Won Kim

School of Mechanical Engineering

Research output: Contribution to journal › Conference article › peer-review

Abstract

In this paper, a method to predict the fracture toughness of thermally-aged CF8A under cyclic loading condition is proposed. The FE damage model based on multi-axial fracture strain energy is applied for the prediction. The predicted results are compared with the experimental data of C(T) specimens. The multi-axial fracture strain energy of unaged CF8A can be obtained from tensile and C(T) data under monotonic loading condition. Then, the multi-axial fracture strain energy of aged CF8A can be determined by introducing the concept of thermal ageing constant "C". From the determined multi-axial fracture strain energy of aged CF8A, the fracture toughness of aged CF8A is predicted under monotonic and cyclic loading condition. The predicted results show good agreement with experimental data.

Original language	English
Pages (from-to)	1297-1304
Number of pages	8
Journal	Procedia Structural Integrity
Volume	13
DOIs	https://doi.org/10.1016/j.prostr.2018.12.274
Publication status	Published - 2018
Event	22nd European Conference on Fracture, ECF 2018 - Belgrade, Serbia Duration: 2018 Aug 25 → 2018 Aug 26

Keywords

C(T) test
Finite element method
Fracture toughness
Low cycle fatigue
Multi-axial fracture strain energy
Themal ageing constant

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials
Civil and Structural Engineering
Materials Science(all)

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10.1016/j.prostr.2018.12.274

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title = "Numerical Simulation of Thermal Ageing Effect on Fracture Behavior for CF8A Cast Stainless Steels under Very Low Cyclic Loading Conditions",

abstract = "In this paper, a method to predict the fracture toughness of thermally-aged CF8A under cyclic loading condition is proposed. The FE damage model based on multi-axial fracture strain energy is applied for the prediction. The predicted results are compared with the experimental data of C(T) specimens. The multi-axial fracture strain energy of unaged CF8A can be obtained from tensile and C(T) data under monotonic loading condition. Then, the multi-axial fracture strain energy of aged CF8A can be determined by introducing the concept of thermal ageing constant {"}C{"}. From the determined multi-axial fracture strain energy of aged CF8A, the fracture toughness of aged CF8A is predicted under monotonic and cyclic loading condition. The predicted results show good agreement with experimental data.",

keywords = "C(T) test, Finite element method, Fracture toughness, Low cycle fatigue, Multi-axial fracture strain energy, Themal ageing constant",

author = "Youn, {Gyo Geun} and Nam, {Hyun Suk} and Kim, {Yun Jae} and Kim, {Jin Won}",

note = "Funding Information: This research was supported by National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT and Future Planning. (NRF-2017R1A2B2009759) Publisher Copyright: {\textcopyright} 2018 The Authors.; 22nd European Conference on Fracture, ECF 2018 ; Conference date: 25-08-2018 Through 26-08-2018",

year = "2018",

doi = "10.1016/j.prostr.2018.12.274",

language = "English",

volume = "13",

pages = "1297--1304",

journal = "Procedia Structural Integrity",

issn = "2452-3216",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Numerical Simulation of Thermal Ageing Effect on Fracture Behavior for CF8A Cast Stainless Steels under Very Low Cyclic Loading Conditions

AU - Youn, Gyo Geun

AU - Nam, Hyun Suk

AU - Kim, Yun Jae

AU - Kim, Jin Won

N1 - Funding Information: This research was supported by National Research Foundation of Korea(NRF) funded by the Ministry of Science, ICT and Future Planning. (NRF-2017R1A2B2009759) Publisher Copyright: © 2018 The Authors.

PY - 2018

Y1 - 2018

N2 - In this paper, a method to predict the fracture toughness of thermally-aged CF8A under cyclic loading condition is proposed. The FE damage model based on multi-axial fracture strain energy is applied for the prediction. The predicted results are compared with the experimental data of C(T) specimens. The multi-axial fracture strain energy of unaged CF8A can be obtained from tensile and C(T) data under monotonic loading condition. Then, the multi-axial fracture strain energy of aged CF8A can be determined by introducing the concept of thermal ageing constant "C". From the determined multi-axial fracture strain energy of aged CF8A, the fracture toughness of aged CF8A is predicted under monotonic and cyclic loading condition. The predicted results show good agreement with experimental data.

AB - In this paper, a method to predict the fracture toughness of thermally-aged CF8A under cyclic loading condition is proposed. The FE damage model based on multi-axial fracture strain energy is applied for the prediction. The predicted results are compared with the experimental data of C(T) specimens. The multi-axial fracture strain energy of unaged CF8A can be obtained from tensile and C(T) data under monotonic loading condition. Then, the multi-axial fracture strain energy of aged CF8A can be determined by introducing the concept of thermal ageing constant "C". From the determined multi-axial fracture strain energy of aged CF8A, the fracture toughness of aged CF8A is predicted under monotonic and cyclic loading condition. The predicted results show good agreement with experimental data.

KW - C(T) test

KW - Finite element method

KW - Fracture toughness

KW - Low cycle fatigue

KW - Multi-axial fracture strain energy

KW - Themal ageing constant

UR - http://www.scopus.com/inward/record.url?scp=85064632635&partnerID=8YFLogxK

U2 - 10.1016/j.prostr.2018.12.274

DO - 10.1016/j.prostr.2018.12.274

M3 - Conference article

AN - SCOPUS:85064632635

VL - 13

SP - 1297

EP - 1304

JO - Procedia Structural Integrity

JF - Procedia Structural Integrity

SN - 2452-3216

T2 - 22nd European Conference on Fracture, ECF 2018

Y2 - 25 August 2018 through 26 August 2018

ER -

Numerical Simulation of Thermal Ageing Effect on Fracture Behavior for CF8A Cast Stainless Steels under Very Low Cyclic Loading Conditions

Abstract

Keywords

ASJC Scopus subject areas

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