Publication detail

Estimation of critical applied stress for crack initiation from a sharp V-notch

NÁHLÍK, L. ŠTEGNEROVÁ, K. HUTAŘ, P.

Original Title

Estimation of critical applied stress for crack initiation from a sharp V-notch

Type

journal article in Web of Science

Language

English

Original Abstract

The aim of this paper is to estimate the critical applied stress value for a crack initiated from a sharp V-notch tip. The classical approach of linear elastic fracture mechanics (LELM) was generalized because the stress singularity exponent differs from 0.5 in the studied case. The value of the stress singularity exponent depends on the V-notch opening angle. The finite element method was used to determine the stress distribution near the sharp V-notch tip and for estimating the generalized stress intensity factor depending on the V-notch opening angle. The critical value of the generalized stress intensity factor was obtained using stability criteria based on the tangential stress component averaged over a critical distance from the V-notch tip and the generalized strain energy density factor. These criteria were applied in the case of corner stress singularity, as well. The calculated values of the critical applied stresses were compared with the experimental data from the literature, and the applicability of the LEFM concept is discussed.

Keywords

Generalized linear elastic fracture mechanics, V-notch, generalized stress intenzity factor, mean stress criterion, critical stress

Authors

NÁHLÍK, L.; ŠTEGNEROVÁ, K.; HUTAŘ, P.

Released

12. 3. 2018

Publisher

2017 Elsevier Ltd. All rights reserved.

ISBN

0167-8442

Periodical

Theoretical and Applied Fracture Mechanics

Number

93

State

Kingdom of the Netherlands

Pages from

247

Pages to

262

Pages count

16

BibTex

@article{BUT156228,
  author="Luboš {Náhlík} and Kateřina {Štegnerová} and Pavel {Hutař}",
  title="Estimation of critical applied stress for crack initiation from a sharp V-notch",
  journal="Theoretical and Applied Fracture Mechanics",
  year="2018",
  number="93",
  pages="247--262",
  doi="10.1016/j.tafmec.2017.09.002",
  issn="0167-8442"
}