Author/Authors :
Golovin، نويسنده , , I.S. and Sinning، نويسنده , , H.-R. and Arhipov، نويسنده , , I.K. and Golovin، نويسنده , , S.A. and Bram، نويسنده , , M.، نويسنده ,
Abstract :
The damping capacities of a few porous structures are studied. Damping in porous structures is enhanced by localised stresses in comparison with the corresponding dense materials. A model for mechanical damping in porous materials is suggested for the “microplastic” range of deformation on the basis of statistical mechanics of micro-heterogeneous materials. Two types of heterogeneity are discussed: one-level porosity (direct by sintered powder steels) and two-level porosity (larger pores in carcass with smaller pores).
