2024-03-29T13:08:04Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/63802022-12-02T11:27:52Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505
Stress-intensity factor solutions for embedded elliptical cracks in round bars subjected to tensile load
Alegre Calderón, Jesús Manuel
Cuesta Segura, Isidoro Iván
Díaz Portugal, Andrés
Stress-intensity factor (SIF)
Round bar
Embedded elliptical cracks
Fatigue crack growth
Recategorization of flaws
Internal defects
Fisheye
In this paper, stress-intensity factor solutions are presented for an embedded elliptical crack in a round bar subjected to tensile load. The stress-intensity factors (SIF) are presented in a tabulated form and were obtained from three-dimensional finite-element analyses of this crack configuration. The solutions provide the stress-intensity factor as a function of three dimensionless parameters representative of the crack size, the crack aspect ratio of the elliptical flaw and its relative position in the cross section. The dimensionless parameters cover ranges that allow most internal flaw shapes in practice to be considered. In order to validate the numerical model developed, some particular cases are compared with solutions of embedded elliptical flaws in different geometries available in the literature. Afterwards, a sequential methodology for fatigue crack growth is presented, including the conditions for the recategorization from the internal elliptical crack to a semi-elliptical surface crack. A comparison of the predicted crack paths with experimental results of fatigue crack propagation initiated from internal defects in round bars is also presented. This experimental validation shows the capability of the proposed SIF solutions for the study of the fatigue crack propagation initiated from internal defects in this geometry.
2022-02-01T09:32:01Z
2022-02-01T09:32:01Z
2022-02
info:eu-repo/semantics/article
0167-8442
http://hdl.handle.net/10259/6380
10.1016/j.tafmec.2021.103189
eng
Theoretical and Applied Fracture Mechanics. 2022, V. 117, 103189
https://doi.org/10.1016/j.tafmec.2021.103189
info:eu-repo/grantAgreement/Junta de Castilla y León//BU-002-P20//Optimización de las técnicas de post-procesado para la mejora de propiedades mecánicas y de fatiga en componentes realizados mediante fabricación aditiva
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier