Method for eliminating nanoindentation size effect by considering elastoplastic deformation mechanism

The invention discloses a method for eliminating a nanoindentation size effect by considering an elasticoplastic deformation mechanism, and belongs to the field of metal material microscale mechanics. An equivalent strain gradient is introduced into a macroscopic strengthening function of a material, and an action coefficient between statistical storage dislocation and geometric necessary dislocation is considered; establishing a micro-scale plastic strengthening function of the material under the micro-scale; based on the relationship between the equivalent strain # imgabs0 # and the SSD density # imgabs1 # and the relationship between the equivalent strain gradient # imgabs2 # and the GND density # imgabs3 #, an intrinsic length scale function # imgabs4 # of the material is established; the micro-indentation hardness model of the material based on indentation hardness # imgabs5 # and indentation depth # imgabs6 # is established by eliminating the elastic deformation depth in the indentation process, accurat