Crack Model according to DUGDALE

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Crack model according to DUGDALE

Fundamentals of the concept

DUGDALE's crack model was derived by WELLS in 1961 and is considered the basis for the Crack tip opening displacement concept (CTOD) concept of yield fracture mechanics. It is based on the assumption that with ductile material behaviour, the fracture process is controlled by a critical plastic deformation, the crack tip opening displacement CTOD or crack opening δ.

Fig.:

Crack model according to DUGDALE

The formation of the plastic zone r_pl depends on the microstructure and therefore cannot be represented in a generally valid form. Deviating from the modelling of the theoretical concepts of fracture mechanics, material-specific plastic zones are demonstrated experimentally.

Dugdale, D. S.: Yielding of Steel Sheets Containing Slits. J. Mech. Phys. Solids 8 (1960) 2, 100 – 104, DOI: https://doi.org/10.1016/0022-5096(60)90013-2
Blumenauer, H., Pusch, G.: Technische Bruchmechanik. Deutscher Verlag für Grundstoffindustrie, Leipzig Stuttgart (1993) 3. Auflage, S. 19, (ISBN 3-342-00659-5; siehe AMK-Büchersammlung unter E 29-3)
Anderson, T. L.: Fracture Mechanics; Fundamentals and Applications. CRC Press, Boca Raton (2005) 3. Auflage, (ISBN 978-0849342608; siehe AMK-Büchersammlung unter E 8-2), DOI: https://doi.org/10.1201/9781315370293
Grellmann, W., Seidler, S. (Eds.): Polymer Testing. Carl Hanser Munich (2022) 3. Edition, 236–239 (ISBN 978-1-56990-806-8; see under AMK-Library A 22) DOI: https://doi.org/10.1016/C2020-0-01638-5

Fundamentals of the concept

See also