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The Hencky model. Problem formulation

Let C be a bounded domain with a smooth boundary L, and Lc be a smooth curve without selfintersections, Lc C fl. We assume that Lc contains its end points. Denote by flc the mid-surface of the plate, flc = fl Lc- We choose a unit normal vector n = 1, 2) to the curve Lc- The curve Tc corresponds to the crack in the plate. The crack shape as a surface in can be described as a G Tc, —h z h, where x = xi,X2) G fl, 2h is the thickness of the plate, is a distance to fl. The domain flc contains, therefore, three components of the boundary T, T+, Tj. Here T fit to the positive and negative directions of the normal n, respectively. Let n = (ni,n2) be the external unit normal vector to L. [Pg.321]

Denote by the Sobolev space of functions having the first [Pg.321]

Hereafter the known Green formula will be used, namely, for all smooth functions w, rriij, i,j = 1,2, we have [Pg.321]

The same formula is valid for the domain flc- In this case the additional integrals over r+,Tj will appear. By we denote the space [Pg.321]

Formulation of the elastoplastic problem for the plate having the crack is as follows. In the domain flc we want to find functions w, m = rriij, ijy bi = 2, satisfying the following equations and inequalities  [Pg.321]


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