Determination of geometric factor for crack growing from a notch

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Abstract

This manuscript studies the behavior of an ASTM A 36
structural steel specimen with a circular stress concentrator of
variable diameter and a notch using computational modeling of
finite elements (Ansys) and fracture mechanics, the test
specimen has a thickness of 5 mm and a notch of 30 mm with
opening of 45° was subjected to cyclic axial load and the
diameter of the concentrator varies from 5mm, 9mm, 13mm,
17mm and 21 mm. This in order to establish the function that
describes the behavior of the dimensionless geometrical factor
(β) in the calculation of the Stress Intensity Factor (SIF). For
each selected diameter, the characteristic equation is obtained
using the Support Vector Machine algorithm based on the
Kernel equations. These results were compared with other
accepted modes, obtaining a high degree of correlation and an
error percentage close to 1.7%. As a main contribution, a new
general mathematical model is obtained for specimens of
defined geometry and concentrator of circular stress
Original languageEnglish
Article number12(9), 2019
Pages (from-to)1541-1546
Number of pages6
JournalInternational Journal of Engineering Research and Technology
Volume12
Issue number9
StatePublished - 5 Oct 2019

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