IrNDT - Non-destructive testing with active thermography

Principle of the thermoelastic stress analysis

If you exercise mechanical sresses on components it will effect different changes of temperature. In the one hand you will recognise a thermal change by mechanical hysteresis and on the other hand a will create a thermal change by the thermoelastic effect.

This means a change in the state of stress makes an impact on the temperature of a component. Thermoelastic stress analysis uses this effect and grabs this change of heat by an ir-camera and analyses the values in the same way like LockIn-thermography.