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31 Cards in this Set
- Front
- Back
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Tension |
Tends to stretch a structural member |
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Ties |
Resist tensile load |
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Compression |
Shorten structural member |
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Struts |
Resist compressive force |
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Shear |
A forces which tends to slide adjacently |
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Riveted joints |
What resist shear forces? |
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Tension, Compression, Shear |
What forces are involved in bending? |
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Torsion |
Also called as twisitng forces |
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Outer/Outer Edge |
In torsion, tensiile force is found on what part? |
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Stress |
An internal force in a structural member resiting externally applied forces |
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Tensile Stress |
What sets-up in a tensile force? |
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Force per unit area |
Define stress |
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Strain |
It happen when a dimensional change occur due to applied force |
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Change in length over original length |
What is the ratio of strain? It is used to measure deformation |
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Buckling |
What happens to thin sheet of metal if subjected to end loads? |
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Elastic Limit |
Deformation is permanent when it go beyond the - |
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DLL |
Maximun load that the aircraft will experience on service |
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DUL |
The maximum load before collapse |
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DLL * safety factor |
Define DUL ina formula |
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1.5 |
Safety factor is equivalent to |
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Safety factor |
Ratio of DUL over DLL |
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2.5G |
DLL of airliners |
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3.4-3.8 G |
DLL for utility a/c |
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6 G |
DLL for aerobatic a/c |
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Safe life |
The maximum number of flying hours and flight cycle. |
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Fail Safe Principle |
Used to apply to structures to minimise the effect of fatigue. Also known as damage toldrance |
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Fail Safe Structure |
A structure with multiple load paths, it is shared by adjacent members |
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Damage Tolerant Structure |
Eliminates extra structural member bu spreading of loads in a larger area |
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Fatigue |
Continual reversal of loads |
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Station numbers |
A method of locating components of the aircraft |
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Zero Datum Line |
Fuselage station lines are determined by a reference called |
