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Aluminum oxide (Al2O3) has an elastic modulus of 400 GPa and a KIc of 4 MPa•m1/2...

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Physics

Aluminum oxide (Al2O3) has an elastic modulus of 400 GPa and aKIc of 4 MPa•m1/2 . A specimen is tested in tension and is found todeform elastically up to the point of fracture at a stress of 450MPa. (a) Make a diagram of engineering stress-engineering strain toshow this behavior. (b) Find the strain at fracture. (b) Estimatethe flaw size (a) that caused failure (assume Y = 1). (c) Ifanother specimen of the same size is prepared and tested, do youexpect failure to be at a stress of 450 MPa again? Why or whynot?

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