Design and Test Verification of Energy Absorption Material in the Soft Landing Gear for Tianwen-1 Mars Probe

LUO Min1, YANG Jianzhong1, HAN Fusheng2, MAN Jianfeng1

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Journal of Deep Space Exploration ›› 2021, Vol. 8 ›› Issue (5) : 472-477. DOI: 10.15982/j.issn.2096-9287.2021.20210044
Topic:Deep Space Extreme Environment Protection and New Materials

Design and Test Verification of Energy Absorption Material in the Soft Landing Gear for Tianwen-1 Mars Probe

  • LUO Min1, YANG Jianzhong1, HAN Fusheng2, MAN Jianfeng1
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Abstract

The landing gear is a key component for soft-landing on Mars, which should use high energy-absorption and excellent thermal stability material to absorb the impact energy of Mars probe. The energy absorption pull rods made by directionally solidified twinning-induced plasticity (TWIP) were utilized for the soft landing gears of Mars lander. The mechanical behavior and microstructure evolution of TWIP steel were investigated. The results show that TWIP steel can sustain the high plasticity of 600 MPa ultimate true stress and 72% true strain. The landing dynamic simulation and experiment results of soft-landing gear drop testes demonstrate that that Mars landing system is able to adapt to the complex topography conditions because of the high energy absorption ability of pull rods.

Keywords

austenitic twinning-induced plasticity steel with high manganese content / landing gear / deep space exploration / design / energy absorption

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LUO Min, YANG Jianzhong, HAN Fusheng, MAN Jianfeng. Design and Test Verification of Energy Absorption Material in the Soft Landing Gear for Tianwen-1 Mars Probe. Journal of Deep Space Exploration, 2021, 8(5): 472‒477 https://doi.org/10.15982/j.issn.2096-9287.2021.20210044

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