Question: 9.) A steel used for an engineering application has a specified yield strength of 1000 MPa and a plane strain fracture toughness of 150

9.) A steel used for an engineering application has a specified yield

9.) A steel used for an engineering application has a specified yield strength of 1000 MPa and a plane strain fracture toughness of 150 MPam. (a) Calculate the minimum dimensions required to carry out a 'valid' plane strain fracture toughness test. (b) Estimate the load capacity of the mechanical testing machine you would need to carry out the fracture test. (c) If the available testing machine has a load capacity of 200 kN, do you need to alter the dimensions of the specimens to obtain a valid Kc? If so, what will you do? Comment on the specimen size requirements for KIC, JIC and CTOD and indicate which type of test may be most appropriate for this material given the capacity of the testing machine.

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