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| Quasi-static DEM and its application to linear viscoelastic simulation |
| Revised:March 20, 2001 |
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| DOI：10.7511/jslx20031002 |
| KeyWord:Quasi\|static Discrete Element Method (DEM), visco\|elasticity, active column method |
| Tang Zhiping Wang Wenqiang |
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| Abstract: |
| Discrete Element Method (DEM) is one of the new\|concept numerical methods developed in recent years. which is applied to the dynamic problems in principle. Based on the static equilibrium conditions, the quasi\|static equations have been settled for discrete element system in this paper, and proved that the coefficient matrix of the equations is symmetric, positive defined, rare, and stripe distributed. An"active column method"is used for saving more RAM and calculation time than Gaussian method. By introducing the generalizedMaxwell model for the interaction between neighboring element pairs, the DEM method for simulating quasi\|static responses of linear viscoelactic materials has been established. The quasi\|static DEM is independent upon the traditional DEM, which is a supplement and development of traditional DEM. It will have more applications. |
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