RT Journal Article ID 49fa16255a7c6866 A1 Su, Yishi A1 Xiaolu, Gong T1 AN ANALYTICAL STRESS-STRAIN MODEL FOR OPEN-CELL METAL FOAM JF Journal of Porous Media JO JPM YR 2012 FD 2012-12-12 VO 15 IS 12 SP 1137 OP 1145 K1 open-cell metal foam K1 analytical stress-strain model K1 relative density K1 plastic Poisson's ratio AB The main objective of the present investigation is to develop an analytical stress-strain model to quantitatively describe the stress-strain behavior of open-cell metal foam. Based on solid mechanics, an analytical stress-strain model is developed. This new stress-strain model involves two main parameters: relative density and plastic Poisson's ratio. As a key characteristic of metal foam, relative density directly takes effect on the uniaxial stress-strain behavior of metal foam and the uniaxial stress of metal foam increases with increasing relative density. Plastic Poisson's ratio is measured as a function of uniaxial compressive plastic strain and its value is neither 0 nor 0.5. Corresponding uniaxial compression tests of metal foams were conducted and numerical simulations were also carried out. The results indicate that this analytical stress-strain model of metal foam is in good agreement with both the experimental validations and the numerical simulations. This work provides useful information for understanding the deformation mechanism of open-cell metal foam. PB Begell House LK https://www.dl.begellhouse.com/journals/49dcde6d4c0809db,103fd63101cbedcf,49fa16255a7c6866.html