Preliminary study on three-dimensional flat-top partition of unity based high-order DDA
Discontinuous Deformation Analysis(DDA)method is an implicit method aimed at simulating large displacement and large deformation of a blocky system with discontinuities.Since the displacement field is usually approximated by the first-order polynomial functions,it leads to a constant stress/strain field within a block.Therefore,in order to improve DDA’s accuracy in modelling the complex stress field,a flattop partition of unity based mesh with a high-order local approximation is utilized in this paper.The basic theory and formula for the flat-top partition of unity based high-order DDA in three-dimensional space are presented.Then,according to the corresponding code developed,a validation example is presented to verify this proposed method.
X.Y.LIU Z.Y.ZHAO X.M.AN A.Q.WU
Nanyang Technological University, Singapore Land Transport Authority, Singapore Yangtze River Scientific Research Institute, Wuhan, China
国际会议
The 12th International Conference on Analysis of Discontinuous Deformation(第12届非连续变形分析国际大会)
武汉
英文
62-68
2015-10-16（万方平台首次上网日期，不代表论文的发表时间）