A specimen of a 4340 steel alloy having a plane strain fracture toughness of 45 MPa/m is exposed to a stress of 1000 MPa (145,000 psi). Will this specimen experience fracture if it is known that the largest surface crack is 0.75 mm (0.03 in.) long? Why or why not? Assume that the parameter Y has a value of 1.0.

Materials Science And Engineering Properties
1st Edition
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Charles Gilmore
Chapter11: Fracture And Fatigue
Section: Chapter Questions
Problem 15CQ
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A specimen of a 4340 steel alloy having a plane strain fracture toughness of 45 MPA/M is
exposed to a stress of 1000 MPa (145,000 psi). Will this specimen experience fracture if it is
known that the largest surface crack is 0.75 mm (0.03 in.) long? Why or why not? Assume that
the parameter Y has a value of 1.0.
Transcribed Image Text:A specimen of a 4340 steel alloy having a plane strain fracture toughness of 45 MPA/M is exposed to a stress of 1000 MPa (145,000 psi). Will this specimen experience fracture if it is known that the largest surface crack is 0.75 mm (0.03 in.) long? Why or why not? Assume that the parameter Y has a value of 1.0.
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