This page compiles some calculations/assumptions made by Tommy Tran on August 4th, 2021.
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Aerobody
Carbon Fiber Panels
Steps:
Find density (kg/m^3) or mass per area (kg/m^2) of prepreg used for manufacturing
Find total volume (m^3) or total surface area (m^2) of carbon fiber panels
Calculate mass (kg) of carbon fiber panels
Step 1 - Density of Material
Material is primarily woven carbon fiber prepreg.
| Info |
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Note: GSM stands for gram per square metre. |
Material | GSM (g/m^2) | Source |
|---|---|---|
Woven Prepreg | 330-980 | Carbon Fiber Prepregs Supplier | Call +86 18918009278 (cacomposites.com) |
Unidirectional Prepreg | 40-460 | Carbon Fiber Prepregs Supplier | Call +86 18918009278 (cacomposites.com) |
Step 2 + 3 - Total surface area and Mass
Panel | Surface Area (m^2) | Mass (SA x 330) (kg) | Mass (SA x 980) (kg) |
|---|---|---|---|
Front Passenger Door | 0.62397025 | 0.2059101825 | |
Back Passenger Door | 0.58076922 | 0.1916538426 | |
Front Driver Door | 0.62397025 | 0.2059101825 | |
Back Driver Door | 0.58076922 | 0.1916538426 | |
Trunk | 1.78484861 | 0.5890000413 | |
Roof | 4.05743353 | 1.338953065 | |
Floor Panel Flat #1 | 0 | ||
Floor Panel Flat #2 | 0 | ||
Floor Panel Flat #3 | 0 | ||
Floor Panel Flat #4 | 0 | ||
Side Panel #1 | 1.79554567 | 0.5925300711 | |
Side Panel #2 | 1.79554567 | 0.5925300711 | |
Hood | 0.4978644 | 0.164295252 | |
A Bulkhead | 0.60443455 | 0.1994634015 | |
C Bulkhead | 1.00960754 | 0.3331704882 | |
B Bulkhead 1 | 0.36814792 | 0.1214888136 | |
B Bulkhead 2 | 0.36814792 | 0.1214888136 | |
Front Bridge | 0 | ||
Mid Passenger Bridge | 0 | ||
Mid Driver Bridge | 0 | ||
Rear Bridge | 0 | ||
Driver Trunk Bridge | 0 | ||
Passenger Trunk Bridge | 0 | ||
Front Driver W.Cover | 0.28933021 | 0.0954789693 | |
Front Pass. W.Cover | 0.28933021 | 0.0954789693 | |
Rear Driver W.Cover | 0.31471481 | 0.1038558873 | |
Rear Pass. W.Cover | 0.31471481 | 0.1038558873 | |
Total | 4.451589731 | 13.21987253 |
Thermoformed Panels
Steps:
Find density (kg/m^3) or mass per area (kg/m^2) of thermoformed panel used for manufacturing
Find total volume (m^3) or total surface area (m^2) of carbon fiber panels
Calculate mass (kg) of carbon fiber panels
Step 1 - Density of Material
Material is polycarbonate or PET G. Calculates will use density of PET G because it is heavier.
Material | Density | Source |
|---|---|---|
PET G | 1.23 g/cm^3 | Ultimate 3D Printing Material Properties Table (simplify3d.com) |
Polycarbonate | 1.22 g/cm^3 | Polycarbonate (PC) Plastic: Properties, Uses, & Structure - Guide (specialchem.com) |
Step 2 + 3 - Total surface area and Mass
Panel | SA (m^2) | Mass (SA x 1.23 x 1/8 inch thickness) (kg) |
|---|---|---|
Windshield | 2.34912165 | 9.173907324 |
Headlight 1 | 0.0305137 | 0.2383272539 |
Headlight 2 | 0.0305137 | 0.2383272539 |
Door Windows | 1.33092338 | 10.39517706 |
Total | 20.04573889 |
Dynamics
An estimate was made.
Used mass properties features on SolidWorks on New S2020 Dynamics Assembly File.
Mass = ~47.8 kg x 2
Mass = 95.6
...
A more accurate attempt (Front vs. Rear Assembly Mass)
Strategy
Inserted updated suspension and wheel geometry + old steering assembly
got mass estimates from CAD of the front section vs. rear section
Remember to multiply by 2 because this is a half car CAD model
these are underestimate approximations
Front Dynamics Assembly
m = 19.61 kg x 2
m = 39.22 kg
...
Rear Dynamics Assembly
m = 33.51 kg x 2
m = 66.02 kg
...
Doors
Unable to find. Would need to ask Geoffrey Liu