›› 2011, Vol. 32 ›› Issue (S1): 766-0771.

• Numerical Analysis • Previous Articles     Next Articles

Discrete element numerical analysis of lunar soil with a simplified contact model

ZHENG Min1, 2, JIANG Ming-jing1, 2, SHEN Zhi-fu1, 2   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University, Shanghai 200092, China
  • Received:2010-12-23 Online:2011-05-15 Published:2011-05-16

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Abstract: Lunar soil can be classified as silty sand according to its particle size distribution. The Lunar environment is quite different from on the earth (such as with no water, low gravitational fields, very low atmospheric pressure, etc.). The Van der Waals forces between soil particles proposed by Perko et al. (2001) is taken into consideration in the simplified lunar siol contact model, which is then implanted into PFC2D. With this model several biaxial compression tests are simulated by the discrete element method (DEM). The effects of Van der Waals forces on the mechanical behavior of samples and the average coordination number of samples are then studied. The results show that the Van der Waals force is a very important factor in controlling the peak strength; and it will lead to extensive dilatancy of the samples.

Key words: lunar soil, contact model, discrete element method, Van der Waals forces

CLC Number: 

  • O 241
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