Method for evaluating plate forming capability and deformation homogenizing capability based on DIC strain measuring system

The invention provides a method for evaluating a plate forming capability and a deformation homogenizing capability based on a DIC strain measuring system. The method comprises the steps of A. dividing a concerned deformation area of a plate into n subunits under the non-deformation situation; B. calculating a reference value of each frame after each subunit is deformed in the DIC strain measuring system; C. calculating average main strain of each subunit on the basis of the DIC strain measuring system; D. calculating a deformation uniformity degree measuring index of each frame of a concerned area by adopting the parameter value after each subunit is deformed as a weight; E. establishing an XY coordinate system for evaluating the forming capability and deformation homogenizing capability of the plate under a specific stress state, wherein the average main strain of each subunit obtained in the step C is used as an X coordinate, and the deformation uniformity degree measuring index obtained in the step D is used as a Y coordinate. The average main strain is used as an index for measuring the forming capability of the plate, so that the overall forming performance of the plate can be accurately and reasonably reflected; meanwhile, by additionally arranging the plate formation uniformity degree measuring index, the uniformity degree of the deformation of the material can be intuitively reflected, and the forming performance of the plate can be comprehensively stated.