Unraveling the myth of closure corrections: Sharpening the definition of opening and closure stresses with an energy approach

Jesse J.A. van Kuijk; René C. Alderliesten; Rinze Benedictus

doi:10.1016/j.ijfatigue.2020.106016

Unraveling the myth of closure corrections: Sharpening the definition of opening and closure stresses with an energy approach

Jesse J.A. van Kuijk^*, René C. Alderliesten, Rinze Benedictus

^*Corresponding author for this work

Structural Integrity & Composites

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The substantiation of fatigue crack closure corrections is disputed, based on the closure stress definition. The ΔK_eff equation lacks a physical explanation. An inconsistency is observed between the opening stress S_{op_phen} as used by this equation and the physical opening stress S_{op_phys}. This S_{op_phys} is related to S_{op_phen} through an energy equivalent area approach. Furthermore, an elastic spring model is used as a physical approach to crack closure effects. An FEA approach generates S_{op_phys} values, which are reworked into S_{op_phen}. This physical model agrees well with existing closure corrections, and is able to provide a physical explanation for their necessity.

Original language	English
Article number	106016
Number of pages	12
Journal	International Journal of Fatigue
Volume	143
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.106016
Publication status	Published - 2021

Keywords

Closure corrections
Crack closure
Crack opening
Crack opening stress
Physics based approach

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10.1016/j.ijfatigue.2020.106016

1-s2.0-S014211232030548X-mainFinal published version, 2.79 MBLicence: CC BY

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title = "Unraveling the myth of closure corrections: Sharpening the definition of opening and closure stresses with an energy approach",

abstract = "The substantiation of fatigue crack closure corrections is disputed, based on the closure stress definition. The ΔKeff equation lacks a physical explanation. An inconsistency is observed between the opening stress Sopphen as used by this equation and the physical opening stress Sopphys. This Sopphys is related to Sopphen through an energy equivalent area approach. Furthermore, an elastic spring model is used as a physical approach to crack closure effects. An FEA approach generates Sopphys values, which are reworked into Sopphen. This physical model agrees well with existing closure corrections, and is able to provide a physical explanation for their necessity.",

keywords = "Closure corrections, Crack closure, Crack opening, Crack opening stress, Physics based approach",

author = "{van Kuijk}, {Jesse J.A.} and Alderliesten, {Ren{\'e} C.} and Rinze Benedictus",

year = "2021",

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AU - van Kuijk, Jesse J.A.

AU - Alderliesten, René C.

AU - Benedictus, Rinze

PY - 2021

Y1 - 2021

N2 - The substantiation of fatigue crack closure corrections is disputed, based on the closure stress definition. The ΔKeff equation lacks a physical explanation. An inconsistency is observed between the opening stress Sopphen as used by this equation and the physical opening stress Sopphys. This Sopphys is related to Sopphen through an energy equivalent area approach. Furthermore, an elastic spring model is used as a physical approach to crack closure effects. An FEA approach generates Sopphys values, which are reworked into Sopphen. This physical model agrees well with existing closure corrections, and is able to provide a physical explanation for their necessity.

AB - The substantiation of fatigue crack closure corrections is disputed, based on the closure stress definition. The ΔKeff equation lacks a physical explanation. An inconsistency is observed between the opening stress Sopphen as used by this equation and the physical opening stress Sopphys. This Sopphys is related to Sopphen through an energy equivalent area approach. Furthermore, an elastic spring model is used as a physical approach to crack closure effects. An FEA approach generates Sopphys values, which are reworked into Sopphen. This physical model agrees well with existing closure corrections, and is able to provide a physical explanation for their necessity.

KW - Closure corrections

KW - Crack closure

KW - Crack opening

KW - Crack opening stress

KW - Physics based approach

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VL - 143

JO - International Journal of Fatigue

JF - International Journal of Fatigue

SN - 0142-1123

M1 - 106016

ER -

Unraveling the myth of closure corrections: Sharpening the definition of opening and closure stresses with an energy approach

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Keywords

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Erratum to “Unraveling the myth of closure corrections: Sharpening the definition of opening and closure stresses with an energy approach” [Int. J. Fatigue 143 (2021) 106016] (International Journal of Fatigue (2021) 143, (S014211232030548X), (10.1016/j.ijfatigue.2020.106016))

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