Damping behavior of 3D woven metallic lattice materials

Abstract

Cu and NiCr metallic lattice materials of two different weaving patterns and densities were manufactured with a proprietary 3-D weaving process, and this study investigated their damping behavior. The results of dynamic mechanical analysis (DMA) experiments demonstrate that the damping properties of the woven lattices are at least an order of magnitude greater than bulk samples of the same materials. The woven metallic lattices were found to have damping loss coefficients comparable to many polymers, but with maximum use temperatures far beyond that of polymers. The origin of the damping phenomenon is investigated experimentally and through the development of a damping model, and the importance of frictional and inertial damping are discussed.

On the Interrelationship Between Static and Vibration Mitigation Properties of Architected Metastructures

“…On one hand, they have opened up new areas of the material property space. This, in addition to evolving 3D printing techniques that enable their manufacturing, have motivated researchers to explore a variety of architectures (Schaedler and Carter, 2016) ranging from lattice topologies (Gibson and Ashby, 1997;Deshpande et al, 2001b;Luxner et al, 2004;Moongkhamklang et al, 2010;Vigliotti and Pasini, 2012;Zheng et al, 2014), foam-like metamaterials (Berger et al, 2017) triply periodic minimal surface geometries (Wang et al, 2011;Dalaq et al, 2016), hierarchical structures (Doty et al, 2012;Meza et al, 2015), honeycomb structures (Gibson and Ashby, 1997;Wadley, 2006;Fleck et al, 2010), and woven topologies (Erdeniz et al, 2015;Ryan et al, 2015;Zhang et al, 2015).…”

Integrating lattice materials science into the traditional processing-structure-properties paradigm

“…Lattice materials comprising periodic arrays of interconnected struts have emerged as a new class of engineering materials with potential for use in an incredibly diverse range of applications, including structural biomedical implants, [1][2][3] aerospace and naval structures, [4] force protection systems, [5,6] thermal management, [5] actuation, [7][8][9] high-performance running shoes, [10] and photonic and phononic crystals. [11,12] They can be designed to exhibit unusual properties, including negative thermal expansion, [13] negative Poisson's ratio, [14] fluid-like elasticity (with an extraordinarily high ratio of bulk to shear moduli), [15] unusually high damping capacity, [16] and negative mass density. [17] When the arrays are large, with individual unit cells being small relative to macroscopic length scales of interest, lattices can be treated effectively as other engineering materials in the sense that their properties can be couched in terms of their volume-averaged response to external stimuli.…”

Damping of selectively bonded 3D woven lattice materials

“…Akin to local resonance, the internal structure can vibrate, but momentum and energy transfer between the two sub-structures is provided by impact and friction, rather than elastic and visco-elastic interactions. This concept is implemented in a novel class of 3D woven (3DW) lattice materials, which have been shown to possess a wide range of remarkable fluidic, thermal and mechanical properties 12 – 15 . Three-dimensional woven lattices are manufactured in two stages.…”