An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 35 . It has been determined that fracture results at a stress of 228 MPa when the maximum (or critical) internal crack length is 2.49 mm. a) Determine the value of for this same component and alloy at a stress level of 342 MPa when the maximum internal crack length is 1.25 mm.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables