Page Comparison

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Testing Methods

• MODS/Pre-calculations

[MAX ELONGATION AND DISPLACEMENT ARE BASED ON WHEN THE ADHESIVE BOND WOULD BREAK]

1. Constant elastic and shear modulus, max elongation of 3 mm, assumed height is 2 mm, max horizontal displacement of 1 mm, constant SA (in mm^2)

   1. σ=Eε, σ=F/A, and ε=∆h/h

   2. τ=Gγ, τ=F/A, and γ=∆x/h

   3. Find F for both.

2. Constant SA (in mm^2), gravity is rounded to 9.8 m/s^2, mass unknown, constant elastic modulus, assumed height is 2 mm, average tensile strength of epoxy given

   1. F=mg, σ=F/A, σ=Eε, and ε=∆h/h

   2. SF=σ_avg/σ

3. N/A

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• MODS/Pre-calculations

1. I expect it to be a very high large force needed .in both cases

2. I expect the change in height to be extremely minimal, and the safety factor to be incredibly high

3. I don’t expect many air bubbles, but I expect a lot of missing edges

• SW

• Physical

Results

• MODS/Pre-Calculations

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1. Approximate Yield Forces: 1.38 giganewtons and 0.284 giganewtons (tensile and shear respectively)

2. Approximate Gravity-Induced Elongation: 0.241 nanometers

   1. Approximate Gravity-Based Safety Factor: 76 million

3. N/A

• SW

• Physical

ResultsAnalysis

• MODS/Pre-Calculations

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1. The force required to dislodge the adhesive from the carbon fiber sandwich or the chassis bars is incredibly huge. This much was expected. Meaning that for this scenario to happen, something truly drastic would have to happen to the car.

2. When sitting in place, the light bottom panel causes very little strain to the adhesive. The elongation seen isn’t even a nanometer. And in this scenario, the safety factor is almost 76 million!

3. N/A

• SW

• Physical

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