Nicolas Cardenas

Investigation into the applicability and performance of the Digital Image Correlation method to measure creep strain in pipe welds in the Eskom power station context.
The life of high temperature and pressure pipework in a power station is primarily determined by the degree of creep damage/strain that the material has undergone.

Quantification of this is currently assessed using Metallographic Replication and Capacitive Strain Gauges.
A complementary method is to generate full field strain maps of the areas of interest using photography and Digital Image Correlation (DIC) techniques. This method may possibly addresses some of the shortcomings of the other two methods.

A laboratory investigation into the applicability and performance of the DIC method to measure full field creep strain within pipe welds at an Eskom power station is to be carried