A steel has the following properties: Yield stress, y=700 MPa, Fracture Toughness, Kic=165 MPam A plate...

 

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A steel has the following properties: Yield stress, y=700 MPa, Fracture Toughness, Kic=165 MPa√m A plate of this steel containing a single edge crack was tested in fatigue under Ao-140 MPa, R=0.5 and Y= 1.12. It was observed experimentally that fatigue crack propagation in the steel could be described by the Paris-type relationship. da AK²-25 AN cycle= where AK is measured in MPa √m. What is the critical crack size a, at max? A steel has the following properties: Yield stress, y=700 MPa, Fracture Toughness, Kic=165 MPa√m A plate of this steel containing a single edge crack was tested in fatigue under Ao-140 MPa, R=0.5 and Y= 1.12. It was observed experimentally that fatigue crack propagation in the steel could be described by the Paris-type relationship. da AK²-25 AN cycle= where AK is measured in MPa √m. What is the critical crack size a, at max?