A machine component is made of Aluminium alloy having an ultimate tensile stress Ou = 350MPa, a fracture toughness Kic = 40 MPa√m and a geometry factor Y=1.12. The component is subject to cyclic tensile stress of 200 MPa and cyclic compressive stress of 70 MPa. Before the operation, using an ultrasonic non-destructive testing technique, it was found that there is an edge crack of length 2mm. The crack growth rate is given by = C(AK), where is in m/cycle, AK = AσY√ла, C≈ 2.2×10-12 da da dN dN and m=3.2. Find the critical crack length.

A machine component is made of Aluminium alloy having an ultimate tensile stress Ou = 350MPa, a fracture toughness Kic = 40 MPa√m and a geometry factor Y=1.12. The component is subject to cyclic tensile stress of 200 MPa and cyclic compressive stress of 70 MPa. Before the operation, using an ultrasonic non-destructive testing technique, it was found that there is an edge crack of length 2mm. The crack growth rate is given by = C(AK), where is in m/cycle, AK = AσY√ла, C≈ 2.2×10-12 da da dN dN and m=3.2. Find the critical crack length.

Elements Of Electromagnetics

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Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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