›› 2009, Vol. 30 ›› Issue (S1): 88-92.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Evolution of force chains in a granular assembly based on indentation test

XIN Hai-li，SUN Qi-cheng，LIU Jian-guo，JIN Feng   

  1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2009-05-20 Online:2009-08-10 Published:2011-03-16

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Abstract:

A granular assembly is a conglomeration of discrete solid and exists in nature widely, such as sand foundations, debris flows and landslides, etc. It is found that external loads generally transmit along the quasi-linear path in the granular assembly, and a special mesoscale structure between a single particle and the entire system, called a force chain, is formed. In other words, granular matter has the typical characteristics of multi-scale. A series of discrete element simulations are conducted on a static granular assembly subjected to indentation by a rigid flat punch. By proposing three conditions for defining a force chain, the evolution of the strong force chain network is presented. The distribution of strong force chain length during the indentation of the punch is also analyzed.

Key words: granular matter, indentation test, force chains, multi-scale

CLC Number: 

  • O469
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