Issue 68

Ch. F. Markides et alii, Frattura ed Integrità Strutturale, 68 (2024) 1-18; DOI: 10.3221/IGF-ESIS.68.01

Revisiting classical concepts of Linear Elastic Fracture Mechanics - Part II: Stretching finite strips weakened by single edge parabolically shaped notches Christos F. Markides National Technical University of Athens, School of Applied Mathematical and Physical Sciences, Department of Mechanics, Zografou Campus, 5 Heroes of Polytechneion Avenue, 157 73, Attiki, Greece markidih@maill.ntua.gr, http://orcid.org/0000-0001-6547-3616 Stavros K. Kourkoulis National Technical University of Athens, School of Applied Mathematical and Physical Sciences, Department of Mechanics, Laboratory of Strength and Materials, Zografou Campus, 5 Heroes of Polytechneion Avenue, 157 73, Attiki, Greece stakkour@central.ntua.gr, http://orcid.org/0000-0003-3246-9308

Citation: Kourkoulis, S.K., Markides, Ch.F, Revisiting classical concepts of Linear Elastic Fracture Mechanics-Part II: Mode I stress concentrations in single and double notched strips, Frattura ed Integrità Strutturale, 68 (2024) 1-18.

Received: 14.12.2023 Accepted: 05.01.2024 Published: 11.01.2024 Issue: 04.2024

Copyright: © 2024 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

K EYWORDS . Linear Elastic Fracture Mechanics, Parabolically-shaped notches, Single edge notched strip, Mode-I loading, Stress Concentration Factor, Stress Intensity Factor, Complex potentials.

I NTRODUCTION

his is the second part of a short three-paper series, the aim of which is to revisit some classical concepts of Linear Elastic Fracture Mechanics (LEFM). In the first paper of the series [1] some controversial issues were discussed, related to: (i) the unnatural overlapping of the lips of ‘mathematical’ cracks in ‘infinite plates’ (a phenomenon that is predicted by the solution of the respective first fundamental problem of LEFM, in case it is formalistically applied), and, (ii) the closely associated issue of negative mode-I Stress Intensity Factors (SIFs). It could be counterargumented of course T

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