a specimen of a 4340 steel alloy having a plane strain fracture toughness of ( ) 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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25-10-2022
Engineering

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a specimen of a 4340 steel alloy having a plane strain fracture toughness of ( ) 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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This specimen steel alloy experience a strain fracture toughness when exposed to the stress of 927MPa

The stress intensity represents the degree of "stress" at the crack's tip. The highest stress intensity that a material can withstand without breaking under very specific (plane-strain) conditions is known as fracture toughness.

We are to determine whether or not the 4340 steel alloy specimen will fracture when exposed to a stress of 1000 MPa, given the values of KIc, Y, and the largest value of an in the material.

we solve for σc

σc=Kk/Y√πa

=45 mpa√ m/(1.0) √(π) 0.75 ×10^-3 m

=927MPa

Therefore, it is likely that this specimen will fracture because it can withstand a stress of 927 MPa, which is less than the applied stress of 1000 MPa, before breaking.

Learn more about plane fracture toughness here:https://brainly.com/question/15320813

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