:. Projects
:. Asteroseismology
:. Dark Matter Galaxies
:. EPR
:. Gravitophotons
:. Hybrid Rocket Engine
:. Pulse-Ram Induction

:. Sections:
:. Disclaimer
:. Purpose
:. Theory
:. References

:. Components:
:. Combustion Chamber
:. CDN Nozzle
:. Gasoline Tank
:. Injector System
:. Internal Structure
:. Launch Control
:. Pressure Manifold
:. Pressure Tank
:. Propellants
:. Solid Fuel and Ignition
:. T-stoff Tanks
:. --

:. Data:
:. CFD CDN01
:. FEA Combustion Chamber
:. FEA F-02
:. FEA F-03
:. FEA F-04
:. FEA F-05
:. FEA F-06
:. FEA F-07
:. FEA T-stoff Flange
:. Pressure Tank Test

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Static Analysis of Flange F-03

1. Description
2. Materials
3. Load & Restraint Information
4. Study Properties
5. Stress Results
6. Strain Results
7. Displacement Results
8. Deformation Results
9. Design Check Results
10. Conclusion
11. Appendix

1. Description:

The F-03 flange is the support flange for the gasoline tank. The flange will be constructed out of 1100 Aluminum alloy 1/16 inch thick and about 6 inches in diameter. The tank will be mounted through the central hole and the 3 outer holes will be attached to the support structure. The flange is intended to steady the top of the gasoline tank and should not see a force differential between the support structure and the mounted tank. For the worst case scenario, we will assume that the total thrust is transmitted through the tank and applied to the flange through the central hole. This would require a failure of the F-02 flange, thus allowing the force to push the gasoline tank up while the attachment points to the support structure remain immobile. Although the flange should see only minor vibration forces, we wanted to see what would happen in the case of a failure in F-02.

2. Materials:

No. Part Name Material Mass Volume

1

F-03

[SW]AL-1100-H2

0.0222241 kg

8.2012e-006 m^3

3. Load & Restraint Information:

Restraint
Restraint-1 <F-03> on 6 Faces fixed.


Load
Force-1 <F-03> on 1 Face apply force 45 lb normal to reference plane with respect to selected reference Face <1> using uniform distribution Sequential Loading

4. Study Properties:

Mesh Information
Mesh Type: Solid mesh
Mesher Used: Standard
Automatic Transition: Off
Smooth Surface: On
Jacobian Check: 29 Points
Element Size: 0.079426 in
Tolerance: 0.0039713 in
Quality: High
Number of elements: 8211
Number of nodes: 17150


Solver Information
Quality: High
Solver Type: FFE
Option: Include Thermal Effects
Thermal Option: Input Temperature
Thermal Option: Reference Temperature at zero strain: 77 F

5. Stress Results:

Name Type Min Location Max Location

Plot1

VON: von Mises stress
12.8267 psi
Node: 11133
(83.152 in,
13.7045 in,
0.0315 in)
45798.7 psi
Node: 15281
(87.0908 in,
11.7203 in,
0.063 in)


F-03 Support Flange-Stress-Plot1
JPEG

6. Strain Results:

Name Type Min Location Max Location
Plot1
ESTRN: Equivalent strain
3.14479e-007
Element: 3657
(87.3786 in,
11.2413 in,
0.0315 in)
0.00343758
Element: 41
(87.0954 in,
11.7199 in,
0.0585966 in)


F-03 Support Flange-Strain-Plot1
JPEG

7. Displacement Results:

Name Type Min Location Max Location

Plot1

URES: Resultant displacement
0 in
Node: 1
(87.4094 in,
11.5394 in,
-1.46945e-012 in)
0.0728963 in
Node: 15212
(85.8493 in,
13.9395 in,
0.0315 in)


F-03 Support Flange-Displacement-Plot1
JPEG

8. Deformation Results:

Plot No. Scale Factor
1
142.01


F-03 Support Flange-Deformation-Plot1
JPEG

9. Design Check Results:

F-03 Support Flange-Design Check-Plot1
JPEG

10. Conclusion:

Flange F-03 is designed to be a support flange only, the only forces it should experience will be minor vibration forces. In the worst case scenario, the flange will experience localized stresses that exceed the yield strength by a factor of 3. Although the flange will begin to elongate in these areas, the flange is not design to be rigid so it is allowed to deflect in order to avoid shearing. The displacement in this scenario appears to be 0.073 inches or about 2 mm, this amount of deflection is within the range of what the material is expected to be able to allow before breaking. Also, in this scenario the thrust will actually be distributed between the support structure, the gasoline tank and the skin, thus decreasing the force differential dramatically. The flange should be able to withstand a force differential of 15 lbs without yielding. So, even though the flange may experience high stresses and minor deflections, it appears that it will remain intact and perform as expected even in the worst case scenario.

9. Appendix:

Material Name:
 [SW]AL-1100-H2
Description:
--
Material Source:
Used SolidWorks Material
Material Library Name:
materials
Material Model Type:
Linear Elastic Isotropic


Property Name Value Units Value Type

Elastic modulus

6.8948e+010

N/m^2

Constant
Poisson's ratio
0.33
NA
Constant
Shear modulus
2.5993e+010
N/m^2
Constant
Mass density
2709.9
kg/m^3
Constant
Tensile strength
1.1032e+008
N/m^2
Constant
Yield strength
1.0342e+008
N/m^2
Constant
Thermal expansion coefficient
2.4e-005
Kelvin
Constant
Thermal conductivity
220
W/(m.K)
Constant
Specific heat
904
J/(kg.K)
Constant