SFTY335 ERAU Mod 3 Materials Used In The Aviation Industry Answers The questions in the attached pictures is a two part question. please read carefully and

SFTY335 ERAU Mod 3 Materials Used In The Aviation Industry Answers The questions in the attached pictures is a two part question. please read carefully and answer each Complete the following:
1. Research and select a metal alloy, a ceramic and a composite material used in the aviation industry. Compare and
contrast the expected Tensile Test response of the materials if you were to conduct such experiments. Include
stress-strain sketches for each material. Label relevant properties (eg. yield strength).
2. Given the metal alloy you selected for question 1, estimate the required diameter of an F-35 landing gear strut
under pure axial loading if we are to achieve a Factor of Safety of 2.0 on a “hard landing.” Assume the strut has a
solid circular cross-section (unlike the hollow cross-section in the module presentation). Assume a solid cross-
section simplifies the “cross-sectional area” equation to A= r2. Assume the same “hard landing axial force of
90,000 lbs, as in the presentation. Assume the strut experience only pure compressive loading, i.e. Normal Stress =
Force/Area.
3. Explain the cost-benefit relationship between metal alloys, ceramics and composites as they relate to aviation
safety.
4. Important: In order to answer this question, you’ll need to watch the SFTY 335 Tensile Test video at the beginning
of this page
A. During the Tensile Test at the Materials Testing Lab at the ERAU Daytona Beach campus, Dr. Solti may have
switched the test specimen to something other than 6061-T6 Aluminum – or maybe he didn’t. Your task is to
determine if he did by identifying the material used based upon the video test results.
B. The specimen diameter was measured and determined to be 0.35 inches. Hints: 1 Newton = 0.2248 pounds.
The test specimen came from one of the four bins identified in the image below at the end of the activity.
1. Bin 1: Al-6061-T651
2. Bin 2: Al-2024-7351
3. Bin 3: Al-7075-T651
4. Bin 4: Steel C1018
C. Write a concise technical memo justifying your findings. Include all calculations. No particular format is
required; however, note that half of the points for this question will be based upon your ability to
professionally and logically communicate your technical findings. The other half will be based upon the
accuracy of your calculations. Assume the following material properties:
Material
Ultimate Tensile Strength
2024-T3 Aluminum
70,000 psi
6061-T6 Aluminum
42,000 psi
7075-T6 Aluminum
75,000 psi
C1018 Steel
64,000 psi
4340 Steel
176,000 psi
Cast Iron tay20 Cast Iron Ductile
Brass
Per cutting
My – A2318
News
A1-2024-TI – WW1… .
AI-6061-T651
Sherler
Paulo
C
Steel CHN
Al-7075-T651
LB 138 Matte
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 2×4, 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.
Figure 1. Side view of quarters stacked on a metal rule
demonstrating a bend in a beam.
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.

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