Method for establishing metal strain rate sensitivity coefficient diagram

The invention discloses a method for establishing a metal strain rate sensitivity coefficient diagram, and the method comprises the following steps: 1, compressing metal under a dynamic load conditionto obtain a true stress sigma and a true strain epsilon, and performing drawing to obtain a sigma-epsilon curve; 2, performing data processing on the sigma-epsilon curve to obtain ln(sigma) and data;3, drawing a scatter diagram according to ln(sigma) and the data, and then performing nonlinear fitting to obtain a spline curve; 4, solving a partial derivative of the spline curve to obtain an m value; 5, carrying out data expansion on the m value, and then performing drawing to obtain a metal strain rate sensitivity coefficient diagram. According to the invention, based on true stress sigma and true strain epsilon data, the mathematical processing is carried out to obtain the m value under the dynamic load condition, then data expansion is carried out, and the full-parameter metal strain rate sensitivity coefficien