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Fatigue life estimation of notched components under multiaxial non-proportional loading with variable amplitudes.

Calculation concepts for determining component fatigue life under non-proportional variable amplitudes loading were investigated.

The fatigue life of notched components until technical crack initiation can be described using the local strain concept. For fatigue life estimation under locally non-proportional loadings, the concept of critical planes has proven effective. In this approach, fatigue life in different planes is examined through the material element at the notch root. The plane with the lowest fatigue life is considered the critical plane.

The presented algorithm consists of two parts: a notch simulation to determine local multiaxial, elasto-plastic stresses and a subsequent damage assessment using the critical plane method.

In this work, the…

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Calculation concepts for determining component fatigue life under non-proportional variable amplitudes loading were investigated.

The presented algorithm consists of two parts: a notch simulation to determine local multiaxial, elasto-plastic stresses and a subsequent damage assessment using the critical plane method.

In this work, the Fatemi/Socie parameter (shear-based), the Smith/Watson/Topper parameter (normal strain-based), and a parameter based on short crack fracture mechanics were investigated for accuracy. The accuracy assessment is based on a comprehensive dataset, including test results of notched specimens subjected to both proportional and non-proportional variable amplitude loading.

Reference: VAL5-2024-035

Title: Fatigue life estimation of notched components under multiaxial non-proportional loading with variable amplitudes.
Author(s): J. Kraft, M. Vormwald
DOI: 10.48447/VAL5-2024-035
Event: VAL5 - Fifth International Conference on Material and Component Performance under Variable Amplitude Loading
Year of publication: 2024
Publication type: conference paper (PDF)
Language: English
Keywords: multiaxial fatigue,critical plane,notches

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Author(s): J. Riebe, P. Hantschke, A. Griesing, M. Kästner

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Author(s): M. Česnik, J. Slavič, M. Boltežar

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Author(s): D. Benasciutti

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Editor(s): A. Esderts, S. Werdin, C. Bleicher

VAL5 Fifth International Conference on Material and Component Performance under Variable Amplitude Loading

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€90.00

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Author(s): M. Palmieri, A. Staffa, J. Slavic, F. Cianetti

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Author(s): D. Fräulin, A. Trapp, M. Hinz, P. Wolfsteiner

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Author(s): T. Lecleve, S. Courtin, F. Szmytka, C. Mai

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Author(s): C. Fällgren, M. Vormwald

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1

Modification of the Findley Damage Parameter for Fatigue Assessment under multi-axial proportional and non-proportional variable Amplitude Loading

Publication type: conference paper (PDF)

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1

English

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