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On the existence of Riemann invariants in the one-dimensional equations of the nonlinear theory of elasticity. (English. Russian original) Zbl 0945.74009
J. Appl. Math. Mech. 63, No. 4, 627-632 (1999); translation from Prikl. Mat. Mekh. 63, No. 4, 655-661 (1999).
For the system of one-dimensional equations of elasticity theory $\frac{\partial v^i}{\partial t} = \frac{\partial }{\partial x} \frac{\partial\Phi}{\partial u^i}, \quad \frac{\partial u^i}{\partial t} = \frac{\partial v^i}{\partial x}\quad \bigg(v^i = \frac{\partial w^i}{\partial t},\quad u^i= \frac{\partial w^i}{\partial x}\bigg),\quad i=1,2,3,$ where $$w^i$$ are the components of the displacement vector and $$\Phi=\Phi(u^1,u^2,u^3)$$ is the elastic potential, the author derives conditions for the existence of Riemann invariants. The author determines the type of the elastic potential for which the system possesses six Riemann invariants, and describes a procedure for their calculation.
##### MSC:
 74B20 Nonlinear elasticity 35Q72 Other PDE from mechanics (MSC2000)
##### References:
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