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Research Article

Experimental low cycle fatigue testing of circular bars with radial through-holes subjected to tension-compression loading

Stephen John Hardy1, Harvir Satsavia2

1College of Engineering, Swansea University, Bay Campus, Swansea, UK                                              2Redstone Rail, Royal Leamington Spa, UK

Keywords

Abstract



Low cycle fatigue;

 Experimental work; 

Circular bars;

 Radial holes;

 Tension-compression


The aim of this experimental testing was to assess how the introduction of features such as holes into a component under severe variable loading can result in low cycle fatigue (LCF) behaviour. Circular bars with a range of radial through-hole diameters were subjected to severe cyclic axial loading until failure occurred. Relationships between the hole diameter, the loading and the number of cycles to failure are shown graphically. Results are also presented using the elastic stress concentration factor (Kt) as the independent variable. Although not strictly applicable in situations where significant plasticity occurs, such as in LCF behaviour, further planned studies might show how Kt can be used as a guide for similar components and loadings with other types of notches. Low cycle fatigue lives in the range 161 to 5280 cycles, for the largest hole/highest load and the smallest hole/lowest load combinations respectively, were observed. The lower value is approaching the ultra-low cycle fatigue (ULCF) regime. In the worst case, the introduction of a radial hole resulted in an average fatigue life reduction factor of more than two orders of magnitude.

© 2020 MIM Research Group. All rights reserved.

LATEST News

02/11/2020 Indexed by SCOPUS: We are informed that our journal is accepted to be included in the SCOPUS Index. See mews for more info.


20/08/2020 Collaboration for IMSTEC 2020: Editorial Board of our journal and Organizing Committee of the 5. International Conference on Material Science and Technology (IMSTEC 2020) have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


25/12/2019 Most Cited Paper Award: The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the 2019 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM).


25/12/2019 Best Paper Award: The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 2019 Best Paper Award of Research on Engineering Structures and Materials (RESM).


13/11/2019 Data articles as a new type of submision: Editorial Board of our journal have decided to accept a new type of submission: data articles. The focus of these papers is only on data and how it is collected but not on its interpretation and drawn conclusions. For more see News section.


(More details of the news may be given in the News section)


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LATEST AWARDS


2019 Most Cited Paper Award:

The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the


2019 Best Paper Award:

The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 


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Last Update:

19.11.2020

(dd.mm.yyyy)