Non-linear finite element analysis method for transmission tower material

The invention provides a power transmission tower material nonlinear finite element analysis method, and relates to the field of power transmission tower finite element analysis. The nonlinear finite element analysis method for the power transmission tower material comprises the following steps of 1, judging whether the material is in a plastic stress-strain state or not, 2, judging the direction of plastic strain by adopting an associated flow criterion, 3, describing the development trend of an initial yield criterion along with the increase of the plastic strain, and 4, calculating the nonlinear finite element of the material. The method comprises the following steps of 1, providing a plurality of plastic material options by using ANSYS, 2, carrying out non-linear bearing capacity analysis on an iron tower, 3, carrying out overall static analysis on a power transmission iron tower structure, and 4, carrying out wind load non-linear analysis on a power transmission tower line system. According to the method