期刊
ARCHIVE OF APPLIED MECHANICS
卷 76, 期 3-4, 页码 229-243出版社
SPRINGER
DOI: 10.1007/s00419-006-0018-8
关键词
computation mechanics; continuum dynamics; discrete element method; numerical model; stress wave propagation
类别
A new method based on the principle of minimum potential energy is presented, aiming to overcome some weakness of the present discrete element method (DEM). Our primary research is to put forward the DEM with a tight theory base and a fit technique for treating continuum dynamic problems. By using this method, we can not only extend the existing seven-disc model, but also establish a new nine-disc model in a general way. Moreover, the equivalences of two kinds of models have been verified. In addition, three numerical examples of stress wave propagation problems are given in order to validate accuracy and efficiency of the present DEM models and their algorithms. Finally, the dynamic stress concentration problem of a square plate with a circular hole is analyzed.
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