Geodesic
Fictitious domain method for equilibrium problems of the Kirchhoff--Love plates with nonpenetration conditions for known configurations of plate edges
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 12 (2019) no. 6, pp. 674-686.

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New models are investigated in this paper, that describe equilibrium states of plates with Signorini type nonpenetration conditions. In these models, it is assumed that under appropriate loading, plates have special deformations with already known configurations of edges. For this case, we deal with new nonpenetration conditions that allow us to describe more precisely the possibility of contact interaction of plate edges. Using the method of fictitious domains, it is proved that an original contact problem for a plate can be obtained by passing to the limit when a rigidity parameter tends to infinity from a family of auxiliary problems formulated in a wider domain. The mentioned family of problems model an equilibrium state of plates with a crack and depend on the positive rigidity parameter. For these problems, to prevent a mutual penetration of the opposite crack faces boundary conditions of inequality type are imposed on the inner boundary corresponding to the crack. For the problem, describing a plate with a crack that intersects the external boundary at zero angle (a case of a boundary having one cusp), the unique solvability is proved.
Keywords: Signorini condition, fictitious domain, non-penetration condition, Kirchhoff–Love plate, crack. 
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     title = {Fictitious domain method for equilibrium problems of the {Kirchhoff--Love} plates with nonpenetration conditions for known configurations of plate edges},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
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Nyurgun P. Lazarev; Vladimir V. Everstov; Natalya A. Romanova. Fictitious domain method for equilibrium problems of the Kirchhoff--Love plates with nonpenetration conditions for known configurations of plate edges. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 12 (2019) no. 6, pp. 674-686. http://geodesic.mathdoc.fr/item/JSFU_2019_12_6_a2/

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