Details
| Original language | English |
|---|---|
| Pages (from-to) | 25-31 |
| Number of pages | 7 |
| Journal | International Journal of Pressure Vessels and Piping |
| Volume | 174 |
| Publication status | Published - Jul 2019 |
| Externally published | Yes |
Abstract
This paper represents the ability of the recently developed methodology for evaluating fracture probability of the ferritic steel components based on the Master Curve methodology. Due to crack-tip constraint, a cracked component may experience a significant change in its effective fracture toughness under a given load and temperature, whereas the Standard Master Curve (SMC) method cannot take into account this change. In this study the conservatisms associated with SMC method for low constraint geometries is investigated for a pressurized cylindrical vessel containing an internal semi-elliptical axial crack. A modification of SMC is developed based on the Q parameter as the crack-tip constraint. The usability of the Modified Master Curve (MMC) approach for structure integrity assessment of the pressure vessel is demonstrated. Three different assessment methodologies including, classical fracture mechanics, SMC, and MMC are compared for failure assessment of a cracked pressure vessel in ductile-to-brittle transition (DBT) region. It is shown that the developed MMC approach has appropriate capability to reduce the overly conservatism in failure assessment results obtained from the other two methods.
Keywords
- Crack-tip constraint, Ductile-to-brittle transition, Fracture toughness, Modified master curve, Pressure vessel, Surface crack
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: International Journal of Pressure Vessels and Piping, Vol. 174, 07.2019, p. 25-31.
Research output: Contribution to journal › Article › Research
}
TY - JOUR
T1 - Application of new constraint based Master Curve in fracture assessment of pressure vessels
AU - Moattari, M.
AU - Moshayedi, H.
AU - Sattari-Far, I.
N1 - Publisher Copyright: © 2019 Elsevier Ltd
PY - 2019/7
Y1 - 2019/7
N2 - This paper represents the ability of the recently developed methodology for evaluating fracture probability of the ferritic steel components based on the Master Curve methodology. Due to crack-tip constraint, a cracked component may experience a significant change in its effective fracture toughness under a given load and temperature, whereas the Standard Master Curve (SMC) method cannot take into account this change. In this study the conservatisms associated with SMC method for low constraint geometries is investigated for a pressurized cylindrical vessel containing an internal semi-elliptical axial crack. A modification of SMC is developed based on the Q parameter as the crack-tip constraint. The usability of the Modified Master Curve (MMC) approach for structure integrity assessment of the pressure vessel is demonstrated. Three different assessment methodologies including, classical fracture mechanics, SMC, and MMC are compared for failure assessment of a cracked pressure vessel in ductile-to-brittle transition (DBT) region. It is shown that the developed MMC approach has appropriate capability to reduce the overly conservatism in failure assessment results obtained from the other two methods.
AB - This paper represents the ability of the recently developed methodology for evaluating fracture probability of the ferritic steel components based on the Master Curve methodology. Due to crack-tip constraint, a cracked component may experience a significant change in its effective fracture toughness under a given load and temperature, whereas the Standard Master Curve (SMC) method cannot take into account this change. In this study the conservatisms associated with SMC method for low constraint geometries is investigated for a pressurized cylindrical vessel containing an internal semi-elliptical axial crack. A modification of SMC is developed based on the Q parameter as the crack-tip constraint. The usability of the Modified Master Curve (MMC) approach for structure integrity assessment of the pressure vessel is demonstrated. Three different assessment methodologies including, classical fracture mechanics, SMC, and MMC are compared for failure assessment of a cracked pressure vessel in ductile-to-brittle transition (DBT) region. It is shown that the developed MMC approach has appropriate capability to reduce the overly conservatism in failure assessment results obtained from the other two methods.
KW - Crack-tip constraint
KW - Ductile-to-brittle transition
KW - Fracture toughness
KW - Modified master curve
KW - Pressure vessel
KW - Surface crack
UR - http://www.scopus.com/inward/record.url?scp=85066410489&partnerID=8YFLogxK
U2 - 10.1016/j.ijpvp.2019.05.009
DO - 10.1016/j.ijpvp.2019.05.009
M3 - Article
VL - 174
SP - 25
EP - 31
JO - International Journal of Pressure Vessels and Piping
JF - International Journal of Pressure Vessels and Piping
SN - 0308-0161
ER -