Meshless numerical results of cloud chart characterization based on patch handle graphics object
Zhongke Tian · Jisuanji gongcheng yu sheji · 2008
Unlike mesh-based finite element method(FEM),the shape function of meshless method(MM) is defined by discrete points in computational domain.Because of mesh independence,compared with FEM,the pre-processing procedure of MM becomes simpler and MM is much more powerful for solving large deformation,high gradient and instantaneous dynamic problems,which always involve severe mesh distortion and indispensable remeshing.Due to the characteristic of discrete particle model,MM is significant for the multi-scale analysis,which requires seamless transition among nano-,micro-,meso-,and macro-scale.While on the other hand,the discrete particle characteristic just results in difficulties for visualizing the meshless numerical results during the post-processing pro-cedure.On the basis of Delaunay triangulation,which constructs background triangular mesh from discrete points in whole domain,the cloud chart characterization for MM is then converted into the creation of triangular patch handle graphics objects.Numerical sample performed in the Matlab environment shows that the low-level graphics function patch is able to set the color shading property for triangle's face and edges to linear interpolation mode according to the vertex colors and consequently.to generate high quality cloud chart rapidly.In contrast,the traditional high-level graphics function fill does not possess such high capability.