Compressive and dissipative behavior of metal rubber under constraints

The paper describes the compressive and dissipative behavior of metal rubber (MR) solids under constraint conditions. The MR samples have been tested with different amounts of lateral restraint; the results show that the stiffness and loss factor increase significantly with increasing constraint. For the 0.21 relative density samples, when they reached an equivalent relative density of 0.23 caused by constraints, the samples exhibited larger loss factor (about 0.3) and tangent modulus (105 MPa). However, for the 0.23 relative density MRs, they exhibited smaller loss factor (about 0.16) and tangent modulus (about 16.5 MPa) without constraint. The MR samples with different relative densities showed similar behaviors. The results indicate that MR under constraints exhibits unique behavior and cannot be simplified into the same density MR under different constraint conditions.