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Elastoacoustic Effect in Rail Steel

Application ID: 4476

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

This model is included as an example in the following products:

Nonlinear Structural Materials Module

The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.