On the effects of unilateral boundary conditions on the crack growth rate under cycling bending loads

Giovanni Pio Pucillo (Corresponding author), Luca Esposito, Davide Leonetti

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Sometimes, structural components experience service conditions that have not taken into account at the design stage. In this study, the effects of the boundary conditions on the crack propagation life have been evaluated using the modified Virtual Crack Closure Technique for a surface crack existing at the root of a shoulder fillet notch in a circular stepped bar under bending. The results show that the presence of a unilateral boundary condition at the shoulder fillet notch significantly influences the SIF's and therefore the number of cycles to failure, but the shape of the crack front does not change during propagation.

LanguageEnglish
Pages245-252
Number of pages8
JournalInternational Journal of Fatigue
Volume124
DOIs
StatePublished - 1 Jul 2019

Fingerprint

Crack Growth Rate
Notch
Cycling
Crack propagation
Boundary conditions
Crack Closure
Cracks
Crack closure
Surface Crack
Crack Propagation
Crack
Roots
Propagation
Cycle
Experience
Influence
Design
Life

Keywords

  • Fatigue Crack Growth
  • Finite Element Method
  • LEFM
  • SIF
  • Virtual Crack Closure Technique

Cite this

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abstract = "Sometimes, structural components experience service conditions that have not taken into account at the design stage. In this study, the effects of the boundary conditions on the crack propagation life have been evaluated using the modified Virtual Crack Closure Technique for a surface crack existing at the root of a shoulder fillet notch in a circular stepped bar under bending. The results show that the presence of a unilateral boundary condition at the shoulder fillet notch significantly influences the SIF's and therefore the number of cycles to failure, but the shape of the crack front does not change during propagation.",
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On the effects of unilateral boundary conditions on the crack growth rate under cycling bending loads. / Pucillo, Giovanni Pio (Corresponding author); Esposito, Luca; Leonetti, Davide.

In: International Journal of Fatigue, Vol. 124, 01.07.2019, p. 245-252.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Esposito,Luca

AU - Leonetti,Davide

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AB - Sometimes, structural components experience service conditions that have not taken into account at the design stage. In this study, the effects of the boundary conditions on the crack propagation life have been evaluated using the modified Virtual Crack Closure Technique for a surface crack existing at the root of a shoulder fillet notch in a circular stepped bar under bending. The results show that the presence of a unilateral boundary condition at the shoulder fillet notch significantly influences the SIF's and therefore the number of cycles to failure, but the shape of the crack front does not change during propagation.

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