CYCLIC ENERGY LOSS OF HONEYCOMBS UNDER IN-PLANE SHEAR LOADING

摘要

In an effort to develop an elastomer-like material with low hysteretic energy loss associated with an energy efficient structural design, a cyclic energy loss model of honeycombs is investigated. In-plane viscoelastic constitutive relations of a honeycomb are developed based on honeycomb geometries and a base material's viscoelastic properties. Using Prony series parameters for the stress-relaxation of a material, a numerical study on hysteretic energy dissipation is conducted for regular and auxetic honeycombs. Finite element (FE) simulation is carried out to validate the numerical study. Preferred cell geometries of honeycombs are also discussed in terms of minimizing the hysteretic energy loss.