Problem

The acrylic polymer from which Figure was obtained has a critical fracture toughness of 2...

The acrylic polymer from which Figure was obtained has a critical fracture toughness of 2 MPa . It is subjected to a stress alternating between 210 and 110 MPa. Calculate the growth rate of a surface crack when it reaches a length of 5 × 10–6 m if f = 1.0.

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