A constraint-based approach for notch cleavage fracture toughness estimations

Oliver Logan; Isabel Hadley; Yin Jin Janin; Nicolas O. Larrosa

doi:10.1016/j.engfracmech.2023.109574

A constraint-based approach for notch cleavage fracture toughness estimations

Oliver Logan, Isabel Hadley, Yin Jin Janin, Nicolas O. Larrosa

Materials for extreme conditions

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Abstract

A stress-based approach is used to evaluate the role of notch sharpness on effective toughness of S355J2 + N steel samples. A notch corrected constraint method based on a J-Q approach is proposed for the first time. The approach is calibrated using experimental fracture data of pre-cracked and notched SEN(B) samples and validated using notched C(T) data from open literature for the same material. A two-parameter Weibull model is used to describe the probability of failure to incorporate confidence levels into the analysis. The methodology shows to be a promising method for assessment of non-sharp defects where benefit may be taken from resolving non-sharp defects acuity.

Original language	English
Article number	109574
Journal	Engineering Fracture Mechanics
Volume	292
DOIs	https://doi.org/10.1016/j.engfracmech.2023.109574
Publication status	Published - 15 Nov 2023

Keywords

Constraint
Elastic-plastic fracture mechanics
Fracture toughness
J-integral
Non-sharp defects
Notch effects
Q-factor

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10.1016/j.engfracmech.2023.109574

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title = "A constraint-based approach for notch cleavage fracture toughness estimations",

abstract = "A stress-based approach is used to evaluate the role of notch sharpness on effective toughness of S355J2 + N steel samples. A notch corrected constraint method based on a J-Q approach is proposed for the first time. The approach is calibrated using experimental fracture data of pre-cracked and notched SEN(B) samples and validated using notched C(T) data from open literature for the same material. A two-parameter Weibull model is used to describe the probability of failure to incorporate confidence levels into the analysis. The methodology shows to be a promising method for assessment of non-sharp defects where benefit may be taken from resolving non-sharp defects acuity.",

keywords = "Constraint, Elastic-plastic fracture mechanics, Fracture toughness, J-integral, Non-sharp defects, Notch effects, Q-factor",

author = "Oliver Logan and Isabel Hadley and Janin, {Yin Jin} and Larrosa, {Nicolas O.}",

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AU - Logan, Oliver

AU - Hadley, Isabel

AU - Janin, Yin Jin

AU - Larrosa, Nicolas O.

PY - 2023/11/15

Y1 - 2023/11/15

N2 - A stress-based approach is used to evaluate the role of notch sharpness on effective toughness of S355J2 + N steel samples. A notch corrected constraint method based on a J-Q approach is proposed for the first time. The approach is calibrated using experimental fracture data of pre-cracked and notched SEN(B) samples and validated using notched C(T) data from open literature for the same material. A two-parameter Weibull model is used to describe the probability of failure to incorporate confidence levels into the analysis. The methodology shows to be a promising method for assessment of non-sharp defects where benefit may be taken from resolving non-sharp defects acuity.

AB - A stress-based approach is used to evaluate the role of notch sharpness on effective toughness of S355J2 + N steel samples. A notch corrected constraint method based on a J-Q approach is proposed for the first time. The approach is calibrated using experimental fracture data of pre-cracked and notched SEN(B) samples and validated using notched C(T) data from open literature for the same material. A two-parameter Weibull model is used to describe the probability of failure to incorporate confidence levels into the analysis. The methodology shows to be a promising method for assessment of non-sharp defects where benefit may be taken from resolving non-sharp defects acuity.

KW - Constraint

KW - Elastic-plastic fracture mechanics

KW - Fracture toughness

KW - J-integral

KW - Non-sharp defects

KW - Notch effects

KW - Q-factor

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DO - 10.1016/j.engfracmech.2023.109574

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VL - 292

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

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A constraint-based approach for notch cleavage fracture toughness estimations

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