Local approach and FEM in brittle fracture prediction

  • Vladislav Kozák Institute of Physics of Materials, Academy of Sciences of the Czech Republic
  • Ivo Dlouhý Institute of Physics of Materials, Academy of Sciences of the Czech Republic

Abstract

Local approach in fracture mechanics is based on the application of appropriate failure micromechanistic models to make predictions of fracture behaviour. The FEA of crack-tip and an associated post-processing routine is usually applied. Here should be noted the distinction between the cells of material, having characteristic microstructural dimensions, which constitute the cleavage process zone, and the corresponding finite elements used to represent their behaviour. Predictions of brittle fracture are based on the Beremin local approach model, where the Weibulliocation parameter Quand shape parameter m have been calculated using FEM for Charpy type specimen. These parameters are considered to be transferable material properties, independent of temperature, specimen geometry or loading mode and can be used for prediction of the stress intensity factor K.

Keywords

References

[1] M. Holzmann et al. The local approach application (in Czech). Conf. Engineering Mechanics, 51-56, Svratka, 1996.
[2] V. Kozák, et al. Evaluation of critical fracture using FEM. Numer. Methods in Continuum Mech., 330-336, Stará Lesná, Slovakia, 1994.
[3] F.M. Beremin. A Local Criterion for Cleavage Pressure Vessel Steel. Metal. Trans. A, Vol. 14A: 2277-2287, 1983.
[4] A.H. Sherry, et al. The application of local approach to assess the influence of in-plane constraint on cleavage fracture. Meeting of ESIS TCI, Elastic Plastic Fracture Mech., PI, 1995.
[5] D.P.G. Lidbury, et al. Application of local approach to predict cleavage and ductile fracture. TAGSI Symp. Advances in Fracture Mech., 1996.
Published
May 31, 2023
How to Cite
KOZÁK, Vladislav; DLOUHÝ, Ivo. Local approach and FEM in brittle fracture prediction. Computer Assisted Methods in Engineering and Science, [S.l.], v. 5, n. 2, p. 193-198, may 2023. ISSN 2956-5839. Available at: <https://cames.ippt.pan.pl/index.php/cames/article/view/1355>. Date accessed: 18 july 2024.
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Articles