Inverse problem of determining the one-dimensional kernel of the viscoelasticity equation in a bounded domain. (English. Russian original) Zbl 1326.35375
Math. Notes 97, No. 6, 867-877 (2015); translation from Mat. Zametki 97, No. 6, 855-867 (2015).
Summary: The one-dimensional integro-differential equation arising in the theory of viscoelasticity with constant density and Lamé coefficients is considered. The direct problem is to determine the displacement function from the initial boundary-value problem for this equation, provided that the initial conditions are zero. The spatial domain is the closed interval \([0, l]\), and the boundary condition is given by the stress function in the form of a concentrated perturbation source at the left endpoint of this interval and as zero at the right endpoint. For the direct problem, we study the inverse problem of determining the kernel appearing in the integral term of the equation. To find it, we introduce an additional condition for the displacement function at \(x = 0\). The inverse problem is replaced by an equivalent system of integral equations for the unknown functions. The contraction mapping principle is applied to this system in the space of continuous functions with weighted norms. A theorem on
the global unique solvability is proved.
MSC:
| 35Q74 | PDEs in connection with mechanics of deformable solids |
| 74D05 | Linear constitutive equations for materials with memory |
| 35R09 | Integro-partial differential equations |
| 35R30 | Inverse problems for PDEs |
Keywords:
viscoelasticity equation; integro-differential equation; Lamé coefficient; displacement function; contraction mapping principle; stress functionReferences:
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