Damping Modeling in Woven Lattice Materials

Woven lattice materials were modelled to develop thin sheet dampers for attenuation of vibrations in high temperature environments. 3-D weaving has enabled manufacturing of woven lattice materials from metallic fibers that are suitable for high temperature applications. Such materials offer promising dynamic characteristic such as high vibration damping that can be combined with cooling and adequate stiffness. Dynamic tests of NiCr woven samples were simulated using LS-DYNA software in order to examine the energy dissipation mechanisms. Inclusion of sliding contact between the wires was needed to obtain realistic damping estimates. Coefficient of friction and gaps between wires affected the simulated damping loss factors. Manufacturing imperfections and perturbations in wire geometries and their effect on design material properties warrant further study.