SCALED MEMORY DESCRIPTION OF HYSTERETIC MATERIAL BEHAVIOR

Herein the concept of scaled memory (SM) is proposed to describe hyste retic material behaviors. SM scales the nonlinear variation of tangent ial modulus during monotonic loadings into a piecewise linear distribu tion, which can easily be modified to simulate specific characteristic s of material behavior during cyclic loadings. As an example, SM is ap plied to eliminate artificial ratchetting in bounding surface plastici ty, and to produce closed stress-strain loops during cyclic loadings, without introducing a single material constant. SM is generalized to s ix dimensions in the particular case of pressure-independent materials , and is applied to simulate the hysteretic responses of metals.