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[1shan]

,nThe material damping is implicitly accounted via non linear plastic deformation effects( and other effects). Given that unlike the linear dynamic analysis there is no parameter which defines material damping. Have you used any plasticity models or erosion controls to define failure/ non linear behavior? Also, if you are in explicit you could use materials which support strain rate effects, (Johnson Cook) which would cause energy to dissipate. The oscillations are in my opinion due to materials operating only in elastic range. You could also check these discussions https://forum.ansys.com/discussion/21167/how-to-add-material-damping-in-ansys-explicit-dynamics and https://forum.ansys.com/discussion/11549/car-bumper-simulation.nnRegards,nIshan.n