2. Theory
For the interpretation of the test results, a short introduction into
the functionality of IrT is provided.
2.1. Infrared thermography
In the present examination, passive IrT and supplementarily also optical
LT are applied to monitor the damage behaviour of mechanically loaded
crack patched specimens. A sketch of the test setup of IrT can be found
in Fig. 1. On the right hand side the loaded specimen is depicted which
sends varying infrared radiation due to varying loading.