An alloy has a fracture toughness of 70 MPa.m^1/2 & has no surface crack greater than 3 mm in length. By how much percent would this largest surface crack have to grow before the system would experience fast fracture under an applied stress of 500 MPa
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A structural steel with a fracture toughness of 60 MPa(m^1/2) has no surface crack larger than 3.5 mm in length. By how much (in %) would this largest surface crack have to grow before the system would experience fast fracture under an applied stress of 420 MPa?
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