SFTY 335 Week 3 Discussion 2 | Assignment Help | ERAU
- embry-riddle-aeronautical-university / SFTY 335
- 10 Jan 2020
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SFTY 335 Week 3 Discussion 2 | Assignment Help | ERAU
3.2 - Discussion: Wing Design/Bending Stress
Structural bending is an important constraint in aircraft
design, aerodynamic performance, and aviation safety. Just consider that in
flight the wingtip of a Boeing 787 can deflect greater than 10 feet compared to
its neutral resting position on the ground. Wow! That’s pretty extreme. Just
think about the mechanical stress(es) on the wing skin and internal spars. The
bottom of the wing in tension, the top in compression. Plus, cyclic fatigue –
both mechanical as the aircraft wing “flaps” and thermal as temperature changes
with altitude.
In this assignment, you’ll conduct a “bending experiment” and
post your thoughts on a Discussion Board.
Part 1:
Conduct your bending experiment:
Pick an object that you have around your home/office that bends.
It could be a ruler as pictured in Figure 1 & 2, a wooden 2x4, bookshelf,
diving board, aircraft wing, etc. For simplicity, we’ll call the object you
chose a beam.
If it’s not already, support the beam on one or both ends. Load
the beam with enough weight such that it bends to a point where you can measure
(or estimate) the maximum deflection.
https://erau.instructure.com/courses/104254/files/19811406/download
Figure 2. Top view of quarters stacked on a metal rule demonstrating a
bend in a beam.
Part 2:
Summarize your experiment and results:
Include a picture of your setup. Discuss your thoughts on the
beam’s structural response. Comment on deflection/deformation, stress profile
(e.g. tension/compression), and the influence of the “beams” geometry,
material, and end/support conditions. How would the structural response differ
if the beam was manufactured from a metal alloy, ceramic, or composite?
Summarize why engineers probably designed your beam (materials and structural
configuration) to optimize performance. Make your post relevant and
conversational.
You are only required to post
and reply once but are encouraged to reply to as many of your
classmates' posts as you wish.
You should submit your initial
post by the fourth day of this module week, and your
reply is due at the end of this module week.
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