Constraint modified time dependent failure assessment diagram (TDFAD) based on C(t)-A2(t) theory for creep crack

Yanwei Dai, Yinghua Liu, Fei Qin, Yuh J. Chao, Haofeng Chen

Research output: Contribution to journalArticle

Abstract

Due to the potential influence of constraint effect on failure assessment, a link is needed to bridge the constraint effect characterized by higher order term asymptotic solution and time dependent failure assessment diagram (TDFAD). In this paper, a modification method for creep toughness incorporating C(t)-A2(t) theory is proposed based on Nikbin-Smith-Webster model. The relation between Q-term and A2(t)-term is also presented for creep crack. Results show that the creep toughness can be influenced by constraint parameter remarkably. A modified TDFAD is proposed based on C(t)-A2(t) solution. Based on the creep data of 316H stainless steel and various compact tension specimens, the modified TDFAD curves considering constraint effect characterized with A2(t)-term is presented and discussed, which indicates the important role of constraint effect on the assessment boundary of TDFAD. The research given in this paper can provide an alternative method in which the constraint effect can be included in TDFAD under high temperature.
LanguageEnglish
JournalInternational Journal of Mechanical Sciences
Publication statusAccepted/In press - 25 Sep 2019

Fingerprint

Creep
cracks
diagrams
Cracks
Toughness
toughness
Stainless Steel
Stainless steel
stainless steels
Temperature
curves

Keywords

  • TDFAD
  • creep toughness
  • constraint effect
  • A2 -parameter
  • CT specimen

Cite this

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title = "Constraint modified time dependent failure assessment diagram (TDFAD) based on C(t)-A2(t) theory for creep crack",
abstract = "Due to the potential influence of constraint effect on failure assessment, a link is needed to bridge the constraint effect characterized by higher order term asymptotic solution and time dependent failure assessment diagram (TDFAD). In this paper, a modification method for creep toughness incorporating C(t)-A2(t) theory is proposed based on Nikbin-Smith-Webster model. The relation between Q-term and A2(t)-term is also presented for creep crack. Results show that the creep toughness can be influenced by constraint parameter remarkably. A modified TDFAD is proposed based on C(t)-A2(t) solution. Based on the creep data of 316H stainless steel and various compact tension specimens, the modified TDFAD curves considering constraint effect characterized with A2(t)-term is presented and discussed, which indicates the important role of constraint effect on the assessment boundary of TDFAD. The research given in this paper can provide an alternative method in which the constraint effect can be included in TDFAD under high temperature.",
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author = "Yanwei Dai and Yinghua Liu and Fei Qin and Chao, {Yuh J.} and Haofeng Chen",
year = "2019",
month = "9",
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language = "English",
journal = "International Journal of Mechanical Science",
issn = "0020-7403",

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Constraint modified time dependent failure assessment diagram (TDFAD) based on C(t)-A2(t) theory for creep crack. / Dai, Yanwei; Liu, Yinghua; Qin, Fei; Chao, Yuh J.; Chen, Haofeng.

In: International Journal of Mechanical Sciences, 25.09.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Constraint modified time dependent failure assessment diagram (TDFAD) based on C(t)-A2(t) theory for creep crack

AU - Dai, Yanwei

AU - Liu, Yinghua

AU - Qin, Fei

AU - Chao, Yuh J.

AU - Chen, Haofeng

PY - 2019/9/25

Y1 - 2019/9/25

N2 - Due to the potential influence of constraint effect on failure assessment, a link is needed to bridge the constraint effect characterized by higher order term asymptotic solution and time dependent failure assessment diagram (TDFAD). In this paper, a modification method for creep toughness incorporating C(t)-A2(t) theory is proposed based on Nikbin-Smith-Webster model. The relation between Q-term and A2(t)-term is also presented for creep crack. Results show that the creep toughness can be influenced by constraint parameter remarkably. A modified TDFAD is proposed based on C(t)-A2(t) solution. Based on the creep data of 316H stainless steel and various compact tension specimens, the modified TDFAD curves considering constraint effect characterized with A2(t)-term is presented and discussed, which indicates the important role of constraint effect on the assessment boundary of TDFAD. The research given in this paper can provide an alternative method in which the constraint effect can be included in TDFAD under high temperature.

AB - Due to the potential influence of constraint effect on failure assessment, a link is needed to bridge the constraint effect characterized by higher order term asymptotic solution and time dependent failure assessment diagram (TDFAD). In this paper, a modification method for creep toughness incorporating C(t)-A2(t) theory is proposed based on Nikbin-Smith-Webster model. The relation between Q-term and A2(t)-term is also presented for creep crack. Results show that the creep toughness can be influenced by constraint parameter remarkably. A modified TDFAD is proposed based on C(t)-A2(t) solution. Based on the creep data of 316H stainless steel and various compact tension specimens, the modified TDFAD curves considering constraint effect characterized with A2(t)-term is presented and discussed, which indicates the important role of constraint effect on the assessment boundary of TDFAD. The research given in this paper can provide an alternative method in which the constraint effect can be included in TDFAD under high temperature.

KW - TDFAD

KW - creep toughness

KW - constraint effect

KW - A2 -parameter

KW - CT specimen

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