Question: 8 . 2 3 . A structural steel with a fracture toughness of ( 6 0 mathrm { MPa } sqrt {

8.23. A structural steel with a fracture toughness of \(60\mathrm{MPa}\sqrt{\mathrm{m}}\) has no surface crack larger than 3 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 500 MPa ?
8 . 2 3 . A structural steel with a fracture

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