A fatigue test was conducted on a carbon steel plate of 15 cm width that has...

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A fatigue test was conducted on a carbon steel plate of 15 cm width that has a penny shaped internal crack of radius 3 mm. The cyclic stress varies between 30 MPa and 130 MPa. Experimental data shows that Fatigue Crack Propagation follows the relation: да = 3.6 x 10¹⁰ (AK) ƏN Information: For a penny-shaped Crack, K =√a, where a is the crack radius. The yield strength of the material is 750 MPa and its fracture toughness is 90 MPa√m. Estimate the number of cycles at which the crack radius will reach the value of 10 mm. A fatigue test was conducted on a carbon steel plate of 15 cm width that has a penny shaped internal crack of radius 3 mm. The cyclic stress varies between 30 MPa and 130 MPa. Experimental data shows that Fatigue Crack Propagation follows the relation: да = 3.6 x 10¹⁰ (AK) ƏN Information: For a penny-shaped Crack, K =√a, where a is the crack radius. The yield strength of the material is 750 MPa and its fracture toughness is 90 MPa√m. Estimate the number of cycles at which the crack radius will reach the value of 10 mm.

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SOLUTION To estimate the number of cycles at which the crack radius will reach 10 mm we can use the given relation for fatigue crack propagation partial a partial N 36 1010 k where k is the range of s... View the full answer