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2017 | OriginalPaper | Buchkapitel

37. Mathematical Model to Predict the Stress Concentration Factor on a Notched Flat Bar in Axial Tension

verfasst von : F. J. Ortega-Herrera, A. Lozano-Luna, J. P. Razón-González, J. M. García-Guzmán, F. Figueroa-Godoy

Erschienen in: Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications, Proceedings of the 5th International Symposium on Experimental Mechanics and 9th Symposium on Optics in Industry (ISEM-SOI), 2015

Verlag: Springer International Publishing

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Abstract

This paper presents the development of a polynomial equation of second degree which allows to predict the value of the stress concentration factor on a flat bar with two notches under to axial load for different rations r/L (notch radio/distance between notches) y W/L (bar width/distance between notches). To obtain the mentioned equation, one hundred simulations are carried out on finite element software to determine maximum stress on the bar and then the stress concentration factor is calculated. A regression analysis using the least square method is applied to fit the data to a quadratic polynomial equation which depends on the rations r/L y W/L. The equation obtained presents a correlation value R ² = 0.98, thus this equation represents reliably the obtained data. The results estimated by the proposed equation for stress concentration factor are compared with the results presented by other authors; a good matching among these approaches is obtained.

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Titel: Mathematical Model to Predict the Stress Concentration Factor on a Notched Flat Bar in Axial Tension
verfasst von: F. J. Ortega-Herrera
A. Lozano-Luna
J. P. Razón-González
J. M. García-Guzmán
F. Figueroa-Godoy
Verlag: Springer International Publishing
Buch: Emerging Challenges for Experimental Mechanics in Energy and Environmental Applications, Proceedings of the 5th International Symposium on Experimental Mechanics and 9th Symposium on Optics in Industry (ISEM-SOI), 2015
Print ISBN: 978-3-319-28511-5

Electronic ISBN: 978-3-319-28513-9

Copyright-Jahr: 2017
DOI: https://doi.org/10.1007/978-3-319-28513-9_37

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