四边形单元 ..........\BilinearQuadAssemble.m ..........\BilinearQuadElementArea.m ..........\BilinearQuadElementPStresses.m ..........\BilinearQuadElementStiffness.m ..........\BilinearQuadElementStiffness2.m ..........\BilinearQuadElementStresses.m ..........\sibianxingdanyuan.emf ..........\sibianxingdanyuan.fig ..........\sibianxingdanyuanplane.m