Thursday, June 16, 2016

Week Four

We have been working on testing the stretchability of our DP980 specimens. To do this we have to prepare the samples by:

  • Polishing the scrap edge (helps ensure that the crack propagates from sheared edge) 
  • Etching a 1mm grid 
  • Measuring the width and thickness 
  • Painting a black and white speckle on the non etched side  

Next we preform the stretchability test using a tensile testing machine equipped with DIC technology that is used to track the painted speckles.

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