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Model ID: 4476

Elastoacoustic Effect in Rail Steels

The elastoacoustic effect is a change in the speed of elastic waves that propagate in a structure undergoing static elastic deformations. The effect is used in many ultrasonic techniques for nondestructive testing of prestressed states within structures.

This example model studies the elastoacoustic effect in steels typically used in railroad rails.

The analysis is based on the Murnaghan material model, which represents a hyperelastic isotropic material, and is based on an expansion of the elastic potential in terms of displacement gradients keeping the terms up to 3rd order. This material model can be used to study various nonlinear effects in materials and structures, of which the elastoacoustic effect is an example.

The example shows good agreement with published experimental results for rail steels typically used in railroad rails.

Boundary color plot of the total displacements.

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