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An alloy steel plate is subjected to a tensile stress of 120 MPa The fracture toughness of the materials is given to be 45 MPa Vm Determine the critical crack length to assure the plate will not

An alloy steel plate is subjected to a tensile stress of 120 MPa. The fracture toughness of the materials is given to be 45 MPa Vm. Determine the critical crack length to assure the plate will not fail under the static loading condition (assume Y= 1). Consider the same plate under the action of cyclic tensile/compressive stresses of 120 MPa and 30MPA respectively. Under the cyclic condition, a crack length reaching 50% of the critical length under static condition would be considered unacceptable. If the component is to remain safe for 3 million cycles, what is the largest allowable initial crack length?

Aug 19 2020 View more View Less

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