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Questions and Answers
What is the function of a wing spar?
To provide structural support and resist bending in the wing.
Which members are considered internal stiffening members?
Column buckling was first studied by Euler in 1744.
True
The critical buckling load $$ is given by the formula $ = \frac{\pi^2 EI}{l^2}$.
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What is the primary cause of out-of-plane deformation in a member under compressive loads?
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What happens when the compressive force causes a column to buckle?
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Match the following concepts with their descriptions:
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Study Notes
Wing Spar Function
- Provides structural support for the aircraft wing, transferring loads from the wing surface to the fuselage.
Internal Stiffening Members
- Spars: These are the primary load-carrying members in a wing, running along the length of the wing.
- Stringers: These are longitudinal members that run along the length of the wing skin, providing additional stiffness and helping to distribute load.
- Ribs: Transverse members that provide support for the wing skin and help to maintain its shape.
Column Buckling
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Euler's Formula: The critical buckling load, Pcr, is given by the formula: Pcr = π²EI/l², where:
- E: Modulus of elasticity of the material.
- I: Area moment of inertia of the cross-section.
- l: Length of the column.
- Primary Cause of Out-of-Plane Deformation: A compressive force applied to a slender column can cause it to buckle, which is a sudden out-of-plane deformation due to lateral instability.
- Effect of Buckling: When the compressive force exceeds the critical buckling load, the column loses its ability to resist further compression and undergoes a sudden collapse.
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Description
This quiz explores key concepts in aerostructures engineering, focusing on column buckling and the role of internal stiffening in aircraft design. Learn about various structural components like ribs, frames, and spars that combat buckling to ensure safety and efficiency in aircraft. Test your understanding of how these elements contribute to the overall integrity of aircraft structures.
