Answer Happy

Classify each of the following failures by identifying its category in Figure below, and explain the reasons for each choice in one or two sentences: 1 ABI FI | Part Deformation. a) An aluminum baseball bat develops a crack. (2 points) b) A child's plastic tricycle, used in rough play to make skidding turns, develops cracks where the handlebars join the frame. (3 points) c) The nickel-alloy blades in an aircraft turbine engine lengthen during service and rub the casing. (2 points) d) The fuselage (body) of a passenger airliner breaks into two pieces, with the fracture starting from cracks that had previously initiated at the corners of window cutouts in the aluminum-alloy material. Classify both the cracks and the final fracture. (2 points) (a) (b) (c) (d) (e) e) A large steel artillery tube (barrel), which previously had cracks emanating from the rifling, suddenly bursts into pieces. Classify both the cracks and the final fracture. (2 points) Answer Time Independent • Elastic • Plastic Time Dependent ● Creep C Fracture Static Loading Brittle Ductile ● Environmental • Creep Rupture Explanation Fatigue: Cyclic Loading High cycle. Low cycle • Fatigue crack growth Corrosion fatigue