Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm

M. Mokhtari; X. Wang; J. Amdahl

doi:10.1201/9781003399759-55

Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm

M. Mokhtari, X. Wang, J. Amdahl

Naval Architecture, Ocean And Marine Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

1 Citation (Scopus)

Abstract

In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular and random shapes of pitting corrosion. The present study investigates the influence of such geometrical simplifications on the results of numerical corrosion fatigue analyses. For this purpose, an isolated complexshaped pit, generated using a hierarchical stochastic algorithm scripted in Python and linked with Abaqus/CAE, is developed in a Q235 steel dog-bone specimen. The numerical results obtained from this model are compared with those from another model containing an idealized counterpart of the irregular pit. A discussion on the effect of pit morphology on the stress/strain history and distribution and fatigue crack initiation is presented.

Original language	English
Title of host publication	Advances in the Analysis and Design of Marine Structures
Subtitle of host publication	Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023)
Editors	J.W. Ringsberg, C. Guedes Soares
Place of Publication	Abingdon, Oxon
Pages	493-500
Number of pages	8
ISBN (Electronic)	9781003399759
DOIs	https://doi.org/10.1201/9781003399759-55
Publication status	Published - 14 Apr 2023
Event	9th International Conference on Marine Structures, MARSTRUCT 2023 - Gothenburg, Sweden Duration: 3 Apr 2023 → 5 Apr 2023

Conference

Conference	9th International Conference on Marine Structures, MARSTRUCT 2023
Country/Territory	Sweden
City	Gothenburg
Period	3/04/23 → 5/04/23

Keywords

corrosion
fatigue

Access to Document

10.1201/9781003399759-55

Cite this

Mokhtari, M., Wang, X., & Amdahl, J. (2023). Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm. In J. W. Ringsberg, & C. G. Soares (Eds.), Advances in the Analysis and Design of Marine Structures: Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023) (pp. 493-500). https://doi.org/10.1201/9781003399759-55

Mokhtari, M. ; Wang, X. ; Amdahl, J. / Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm. Advances in the Analysis and Design of Marine Structures: Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023). editor / J.W. Ringsberg ; C. Guedes Soares. Abingdon, Oxon, 2023. pp. 493-500

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title = "Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm",

abstract = "In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular and random shapes of pitting corrosion. The present study investigates the influence of such geometrical simplifications on the results of numerical corrosion fatigue analyses. For this purpose, an isolated complexshaped pit, generated using a hierarchical stochastic algorithm scripted in Python and linked with Abaqus/CAE, is developed in a Q235 steel dog-bone specimen. The numerical results obtained from this model are compared with those from another model containing an idealized counterpart of the irregular pit. A discussion on the effect of pit morphology on the stress/strain history and distribution and fatigue crack initiation is presented.",

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Mokhtari, M, Wang, X & Amdahl, J 2023, Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm. in JW Ringsberg & CG Soares (eds), Advances in the Analysis and Design of Marine Structures: Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023). Abingdon, Oxon, pp. 493-500, 9th International Conference on Marine Structures, MARSTRUCT 2023, Gothenburg, Sweden, 3/04/23. https://doi.org/10.1201/9781003399759-55

Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm. / Mokhtari, M.; Wang, X.; Amdahl, J.
Advances in the Analysis and Design of Marine Structures: Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023). ed. / J.W. Ringsberg; C. Guedes Soares. Abingdon, Oxon, 2023. p. 493-500.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

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T1 - Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm

AU - Mokhtari, M.

AU - Wang, X.

AU - Amdahl, J.

PY - 2023/4/14

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N2 - In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular and random shapes of pitting corrosion. The present study investigates the influence of such geometrical simplifications on the results of numerical corrosion fatigue analyses. For this purpose, an isolated complexshaped pit, generated using a hierarchical stochastic algorithm scripted in Python and linked with Abaqus/CAE, is developed in a Q235 steel dog-bone specimen. The numerical results obtained from this model are compared with those from another model containing an idealized counterpart of the irregular pit. A discussion on the effect of pit morphology on the stress/strain history and distribution and fatigue crack initiation is presented.

AB - In numerical corrosion fatigue studies, the complex pit morphology is often idealized using an overly simplified geometry with a smooth surface because of the difficulties involved in modelling defects with the irregular and random shapes of pitting corrosion. The present study investigates the influence of such geometrical simplifications on the results of numerical corrosion fatigue analyses. For this purpose, an isolated complexshaped pit, generated using a hierarchical stochastic algorithm scripted in Python and linked with Abaqus/CAE, is developed in a Q235 steel dog-bone specimen. The numerical results obtained from this model are compared with those from another model containing an idealized counterpart of the irregular pit. A discussion on the effect of pit morphology on the stress/strain history and distribution and fatigue crack initiation is presented.

KW - corrosion

KW - fatigue

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BT - Advances in the Analysis and Design of Marine Structures

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Mokhtari M, Wang X, Amdahl J. Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm. In Ringsberg JW, Soares CG, editors, Advances in the Analysis and Design of Marine Structures: Proceedings of the 9th International Conference on Marine Structures (MARSTRUCT 2023, Gothenburg, Sweden, 3-5 April 2023). Abingdon, Oxon. 2023. p. 493-500 doi: 10.1201/9781003399759-55

Numerical analysis of pit-to-crack transition under corrosion fatigue using a stochastic pit generation algorithm

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