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A PMMA plate with a 25 mm (width) x 6.5 mm (thickness) cross-section has a contained...

A PMMA plate with a 25 mm (width) x 6.5 mm (thickness) cross-section has a contained crack of length 2c = 0.5 mm in the center of the specimen. If the applied load (along the 2 length direction) is 1000 N, calculate the stress intensity factor. If the fracture toughness of PMMA, K1c = 1.15 MPa.m1/2, at what load (in N) does the crack propagate?

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Answer #1

Draw the schematic diagram of the plate. Calculate the geometric factor.Calculate the stress intensity factor. K =Y,,NTC =(1.0002)(23065) Vax(0.25*10*) = 0.1725 MPa-m? Calculate the amount of load

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