A structural beam made of 7075-T6 aluminum has a rectangular cross section 0.38-inch thick and 4-inch...

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A structural beam made of 7075-T6 aluminum has a rectangular cross section 0.38-inch thick and 4-inch deep. It is subjected to a 3-point bending with a mid-point loading P. The span (distance between the outer supports) S is 44 inches. During inspection, a through the thickness edge crack of length 0.5 inch has been detected on the tensile surface of the beam. Treat the beam as an SENB in 3-point bending. a. Determine the collapse load, Pc. b. Determine the SIF or K-ratio, K, in terms of P. (that is, K = (??)P) c. Using the Failure Assessment Diagram (FAD), determine the maximum load P the member can withstand without failure (find Pcr). Given: Yield stress = 75 ksi; Ult. strength = 83 ksi; K = 70 ksiin A structural beam made of 7075-T6 aluminum has a rectangular cross section 0.38-inch thick and 4-inch deep. It is subjected to a 3-point bending with a mid-point loading P. The span (distance between the outer supports) S is 44 inches. During inspection, a through the thickness edge crack of length 0.5 inch has been detected on the tensile surface of the beam. Treat the beam as an SENB in 3-point bending. a. Determine the collapse load, Pc. b. Determine the SIF or K-ratio, K, in terms of P. (that is, K = (??)P) c. Using the Failure Assessment Diagram (FAD), determine the maximum load P the member can withstand without failure (find Pcr). Given: Yield stress = 75 ksi; Ult. strength = 83 ksi; K = 70 ksiin