11.2 Flashcards
Airframe Structures
what is fail safe design
when a structural member fails and another component assumes it
longerons carry what loads
primary bending loads
4 main stresses
tension, compression, torsional, shear
2 main types of construction of fuselage
monocoque and semi-monocoque
problem with fail safe
additional weight
classifications of structure
primary , secondary , tertiary
what is primary structure
critical load bearing structure, failure reduces structural integrity
what is secondary structure
not a primary load bearing member, failure doesn’t reduce structural integrity
what is tertiary structure
not a load carrying member, not integral portion of airframe
which area subjected to hoop stress
presssure cabin
components of hoop stress
circumferential and axial
where is pressure load shared in semi-monocoque
between skin and structure
what is safe life
period component failure is highly unlikely
pre treatments on aluminium
anodizing, chemical conversion, wash primer
system to identify location of components
zonal and station identification system
