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Structure layer model in continuum-discontinuum element method
Zhou D(周东); Li SH(李世海); Zhang QB(张青波); Liu TP(刘天苹)
Source PublicationProceedings of the 6th International Conference on Discrete Element Methods and Related Techniques
Conference Name6th International Conference on Discrete Element Methods and Related Techniques (DEM 6)
Conference DateAUG 05-06, 2013
Conference PlaceGolden,Colorado,USA
AbstractA new interface model for discrete element method, named structure layer model, is introduced. Structure layer is composed of spring elements and adopted to continuumdiscontinuum element method, CDEM. It is with thickness but without mass. Thin intercalation in the discontinuous geologic bodies as well as the interface between elements in the continuous problem can be modeled by structure layer. Different from the traditional interface spring model in discrete element method, the stiffness of structure layer has definite physical meaning, because the layer is with real thickness and all the parameters are determined by the factual material. Not only tension and shear, but also Poisson effect and pure shearing can be expressed with structure layer model, which increases the accuracy of numerical modeling for thin structure layer. Meanwhile, since there is no need to set large spring stiffness to ensure displacement continuity of nodes at the same place as in the interface spring model, large time step can be adopted, efficiency of computation is increased.
Document Type会议论文
Recommended Citation
GB/T 7714
Zhou D,Li SH,Zhang QB,et al. Structure layer model in continuum-discontinuum element method[C]Proceedings of the 6th International Conference on Discrete Element Methods and Related Techniques,2013:445-450.
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