Very low cycle fatigue life evaluation models and validation using notched compact tension test data

Jong Min Lee; Yun Jae Kim; Jin Weon Kim

doi:10.1016/j.ijfatigue.2021.106635

Very low cycle fatigue life evaluation models and validation using notched compact tension test data

Jong Min Lee, Yun Jae Kim, Jin Weon Kim

School of Mechanical Engineering

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

5 Citations (Scopus)

Abstract

Strain-based and energy-based model are proposed for the evaluation of very-low cycle fatigue life considering multi-axial stress states. In the strain-based model, based on void growth and shrinkage, the void shrinkage ratio is proposed as a function of the plastic strain range. The energy-based model is developed by considering stress triaxiality in the relationship between fatigue life and fracture strain energy. For validation, two models are determined using smooth and notched bar tensile test and best-fit fatigue life curves of SA508 Gr.3 and TP316L. Fatigue lives predicted by both models are within 85% of experimental values in all cases.

Original language	English
Article number	106635
Journal	International Journal of Fatigue
Volume	155
DOIs	https://doi.org/10.1016/j.ijfatigue.2021.106635
Publication status	Published - 2022 Feb

Bibliographical note

Funding Information:
This work was supported by Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (No. 20193110100020, No. 20181510102380).

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

Finite element analysis
Notched C(T) test
Very low cycle fatigue life evaluation

ASJC Scopus subject areas

Modelling and Simulation
General Materials Science
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2021.106635

Cite this

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title = "Very low cycle fatigue life evaluation models and validation using notched compact tension test data",

abstract = "Strain-based and energy-based model are proposed for the evaluation of very-low cycle fatigue life considering multi-axial stress states. In the strain-based model, based on void growth and shrinkage, the void shrinkage ratio is proposed as a function of the plastic strain range. The energy-based model is developed by considering stress triaxiality in the relationship between fatigue life and fracture strain energy. For validation, two models are determined using smooth and notched bar tensile test and best-fit fatigue life curves of SA508 Gr.3 and TP316L. Fatigue lives predicted by both models are within 85% of experimental values in all cases.",

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AU - Lee, Jong Min

AU - Kim, Yun Jae

AU - Kim, Jin Weon

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Y1 - 2022/2

N2 - Strain-based and energy-based model are proposed for the evaluation of very-low cycle fatigue life considering multi-axial stress states. In the strain-based model, based on void growth and shrinkage, the void shrinkage ratio is proposed as a function of the plastic strain range. The energy-based model is developed by considering stress triaxiality in the relationship between fatigue life and fracture strain energy. For validation, two models are determined using smooth and notched bar tensile test and best-fit fatigue life curves of SA508 Gr.3 and TP316L. Fatigue lives predicted by both models are within 85% of experimental values in all cases.

AB - Strain-based and energy-based model are proposed for the evaluation of very-low cycle fatigue life considering multi-axial stress states. In the strain-based model, based on void growth and shrinkage, the void shrinkage ratio is proposed as a function of the plastic strain range. The energy-based model is developed by considering stress triaxiality in the relationship between fatigue life and fracture strain energy. For validation, two models are determined using smooth and notched bar tensile test and best-fit fatigue life curves of SA508 Gr.3 and TP316L. Fatigue lives predicted by both models are within 85% of experimental values in all cases.

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Very low cycle fatigue life evaluation models and validation using notched compact tension test data

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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