CAJ | 학술논문

软着陆机构与模拟月壤滑移性能是影响月球探测器月面软着陆稳定性的重要因素.针对缓冲机构所用足垫材料-硬铝,通过直剪仪开展界面直剪试验,研究不同法向应力和剪切速率下不同相对密度模拟月壤和光滑铝板间的接触面变形、强度特性.试验结果表明,稍密时接触面无明显剪应力峰值,近理想弹塑性变形;密实条件下接触面破坏时呈现应变软化现象;法向压力增加接触面强度增加,接触面强度随剪切速率增加而降低,接触面摩擦角取26.8°~31.4°之间.
연착륙궤구여모의월양활이성능시영향월구탐측기월면연착륙은정성적중요인소.침대완충궤구소용족점재료-경려,통과직전의개전계면직전시험,연구불동법향응력화전절속솔하불동상대밀도모의월양화광활려판간적접촉면변형、강도특성.시험결과표명,초밀시접촉면무명현전응력봉치,근이상탄소성변형;밀실조건하접촉면파배시정현응변연화현상;법향압력증가접촉면강도증가,접촉면강도수전절속솔증가이강저,접촉면마찰각취26.8°~31.4°지간.
Slip behavior between soft landing mechanisms and simulant lunar soil is one of the most important factors, which influence the stability of lunar explorer landing. Duralumin was the material of cushioning mechanism foot pad. A series of simulant lunar soil - aluminum plate shear tests are performed by direct shear apparatus. The shear deformation and strength of interface between simulant lunar soil-smooth aluminum plate under different relative densities, different shear velocities and different normal stresses are studied. Interface under slightly dense soil presents ideal elastoplastic deformation, accompanied with strain-softening. The interface strength increases with the normal stress increase accompanied with shear velocity;interface friction angle is 26.8°-31.4°.