Lander Egress Design Progress Report 9/26/2011
Rover Egress Design11/9/2011Hahna AlexanderAnton GalkinZack Morrison
1Anton 1Results Outline2Ramp Segment DesignHinge DesignDeployment MechanismComposite AnalysisFabricationReady to Manufacture3
Ready to Manufacture4
Drawings Bill of Materials Finalized
Hinge Modifications5
Spring Deployment Mechanism6
Spring Deployment Mechanism7
Frangibolts Reusable, ExpensiveHitch Pin for Earth-Ramps practicalAdjustable for Lunar Design
Ramp Segment Design8Flange4 HeightNo TaperX+ PatternReduced Thickness
Design Changes: Base Pattern9Changed Base Platform Pattern: ANSYS
NEWOLDMoment on Ramp Segments10
Moment Drives Truss Design11
Moment Drives Truss Design12
Tapered Design Considered13Taper
No Taper
Buckling14Finite Element Analysis Strange ResultsHand calculationsFactor of Safety = 3
Design Parameter Optimization15Sheet Metal Thickness
Fillet RadiusX Pattern Dimension #1
X Pattern Dimension #2Strength-to-Weight RatioFactor of Safety
Ramp Segment Design16Flange4 HeightNo TaperX+ PatternReduced ThicknessANSYS Results17
ANSYS simulations for stress and buckling used to improve design
Composite Testing 18Off-Planet use of composites more practical than Aluminum
Composites will be lighterAbout 2.25kg, Full two segments (no holes), FOS >2
Composite Testing19
Work to be Completed20Manufacturing NREC, mfg.com
Implementing the Test Plan Geometry, Small Scale, Landing Conditions, etc.
1Written Blog Left
Final Paper Questions?21
Moment Drives Truss Design22
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