A wide plate is manufactured from high strength Al 7075 and the material is loaded with...
A wide plate is manufactured from high strength Al 7075 and the material is loaded with a stress of 250 MPa. KIc for this material is 24 MPa m1/2 and the yield stress is 495 MPa.
a. If the geometry is such that Y = 1.25, what is the maximum length of an internal crack that the material can sustain without catastrophic failure?
b. Assuming that the stress was sometimes reduced to 200 MPa, but it cycled between 200 and 250 MPa instead of remaining constant, would the maximum internal allowable crack length necessarily remain the same? Why?
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A wide plate is manufactured from high strength Al 7075 and the
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