摘要
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。
Slip behavior between soft landing mechanisms and simulant lunar soil is one of the most important Iactors, wmcn 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.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2013年第4期1058-1062,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助(No.51278451)
浙江省自然科学基金资助(No.LZ12E09001)
关键词
摩擦系数
足垫
滑移特性
摩擦角
剪切速率
相对密度
friction coefficient
foot pad
slip behavior
friction angle
shear velocity
relative density
