一个基于matlab的有限元分析程序，用三角形单元对二位有限元问题进行分析-A matlab based on the finite element analysis program, two finite element analysis using triangular elements

《有限元方法编程 第三版》Fortran程序，P58 使用20节点块单元的三维空间问题分析，调试通过。-<Programming the Finite Element Method 3th> program 5.8 three dimensional analysis of an elastic solid using uniform 20-node hexahedral brick elements.