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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 application was built using the following:

Nonlinear Structural Materials Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.