Data Table Acceleration Due To Gravity On The Moon Gmoon 1 62 M S2 Young S Modulus For Al E 71 Gpa Young S Modulu 1 (118.15 KiB) Viewed 23 times
DATA TABLE Acceleration due to gravity on the Moon (gmoon) = 1.62 m/s2 Young's modulus for Al (E)= 71 GPa Young's modulus for Ti (E) = 110 GPa Young's modulus for soil (E) = 0.6 MPa Density of Al = 2710 kg/m3 Density of Ti= 4510 kg/m Poisson’s ratio for engineering materials v=0.35 Poisson's ratio for soils v=0.3 Lunar regolith density, p= 1500 kg/m3 Lunar regolith friction angle o=40° Lunar regolith cohesion c= 0.5 kN/m² Lunar regolith modulus of cohesion of soil deformation ke = 1.4 x 103 N/m² Lunar regolith modulus of friction of soil deformation ko = 8.2 x 10% N/m3 = 1 NASA's ATHLETE (all-terrain hex-limbed extraterrestrial explorer) lunar rover chassis comprises six wheels each mounted onto an articulated leg. Each of its six wheels has a diameter of 0.71 m and width of 0.2 m. The articulated legs allow the rover to step over obstacles up to 1.5 m in height above the lunar surface. The mass of the chassis itself is 850 kg. It carries a 2.34 m diameter by 3.66 m long habitat module which fully laden masses at 15 metric tonnes, i.e. total rover mass of 15.85 tonnes on the Moon.
6. Calculate soil thrust H, soil compaction resistance Rc (assuming this is the only resistance to motion) and drawbar pull of ATHLETE and its habitat payload assuming there are no grousers in either case and the total vehicle mass is 15.850 tonnes in both cases. (16 marks)
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