关键词: 颗粒堆;应力关系;弹性理论

Abstract:

Stress distribution of static granular pile is yet an unsolved question up to now,for which several stressrelation models have been suggested in physical literature,including the famous fixed principle axe model and recently proposed tangential stress model. To clarify their relationship with theory of granular elasticity,  the approximations of the models as solutions of the elastic equations and the way to improve were analyzed . The results showed that a good agreement between the models and elastic theory could be seen well inside the pile, while remarkable deviation occured as free boundary of pile side However, the deviation could be improved by decreasing strength of tangential stress near the boundary.

Key words: granular pile; stress relation; elastic theory