1. MLS based local approximation in numerical manifold method.
- Author
-
Chen, Yuanqiang, Zheng, H., Li, Wei, and Lin, Shan
- Subjects
- *
NUMERICAL analysis , *FINITE element method , *COMPUTER simulation , *APPROXIMATION theory , *GEOTECHNICAL engineering - Abstract
Purpose The purpose of this paper is to propose a new three-node triangular element in the framework of the numerical manifold method (NMM), which is designated by Trig3-MLScns.Design/methodology/approach The formulation uses the improved parametric shape functions of classical triangular elements (Trig3-0) to construct the partition of unity (PU) and the moving least square (MLS) interpolation method to construct the local approximation function.Findings Compared with the classical three-node element (Trig3-0), the Trig3-MLScns element has a higher order of approximations, much better accuracy and continuous nodal stress. Moreover, the linear dependence problem associated with many PU-based methods with high-order approximations is eliminated in the present element. A number of numerical examples indicate the high accuracy and robustness of the Trig3-MLScns element.Originality/value The proposed element inherits the individual merits of the NMM and the MLS. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF