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How to determine fracture toughness Kic from a punch test?

  1. Apr 25, 2015 #1
    I am looking to determine fracture toughness for aluminium, from a punch test. I have the dimensions of the specimen and the load-displacement curve of the test. I have seen how to calculate Kic for brittle materials from a punch test but am struggling to find a formula for ductile materials such as aluminium.

    thanks
     
  2. jcsd
  3. Apr 26, 2015 #2
    anyone please?
     
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