Transactions of Nanjing University of Aeronautics & Astronautics
Collision Analysis of Lunar High-Speed Landing Mechanism and Foam Metal Fracture Under Extreme Temperature
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Abstract:
The stress and strain of the components composed of prefabricated grooves， warheads， foam titanium， foam aluminum and the detector are calculated when they rush to the moon surface rocks at a speed of 130 m/s and under 1/6 gravity of earth. The foam metal in the component can bear the force of the detector and provide the recoil force. The stress of preformed groove and warhead is 1 200—2 000 MPa， while the stress of foam titanium and foam aluminum is 10 MPa and 1 MPa， respectively， with significant reduction. The stress of foam titanium is reduced to 1%， and that of foam aluminum is reduced to 1 ‰. The component has also undergone a series of different angle collision tests at low temperatures （-182.85 ℃） and high temperatures （127.15 ℃）， and the detector can still operate normally.
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This work was supported by the National Natural Science Foundation of China （No.51175481）； the Hubei Sannong Science and Technology Talents Project 2020—2021.
Clc Number:
V41
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