Auxetic honeycombs with lossy polymeric infills for high damping structural materials

摘要: Structural grade materials with Young’s Modulus in the gigapascal range generally have very low damping, leading to requirement for auxiliary damping treatments many applications. This article examines whether a high and level can simultaneously be realized by introducing lossy polymeric infills into auxetic aluminum honeycombs. Using finite element analysis, honeycombs varying cell geometry infill stiffness, loaded x- y-directions, are examined. From results, it is observed that best performance achieved when shallow inclined walls short vertical x-direction. excess of 10 GPa achievable combination loss factor 5%. If higher 10% required, 5.5–6.5 still realized. The factors attributed local strain levels central region t...