On the Origin of the δ k-Model and the Model of Plastic Strips.

Autor: Panasyuk, V., Yarema, S.
Zdroj: Materials Science; Mar2001, Vol. 37 Issue 2, p346-353, 8p
Abstrakt: On the basis of a survey of works, we demonstrate the priority of the Lviv school of mechanics in the field of creation and development of the deformation theory of limiting equilibrium of bodies with cracks known as the δ k-model. The theory is based on the criterion of crack opening displacement proposed by Leonov and Panasyuk and on the procedure of evaluation of this quantity by modeling the inelastic zones in front of the crack by cuts the edges of which are loaded by certain stresses σ0 whose physical meaning is determined by the properties of the material. This method (known as the model of plastic strips) is also used for the determination of the development of plastic zones at the crack tip for various configurations of plates and loads and also in twisted bodies. The results of numerical calculations agree with the experimental data. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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