Hexagonal and circular honeycombs have stable plastic deformation modes and excellent energy absorption capability under in-plane impact, which are used to make energy absorption device generally.

Optimum design of multi-functional orthotropic honeycomb materials;

Equivalent couple-stresses and asymmetric equivalent stresees are introduced todescribe the equivalent constitutive equations of honeycomb materials in plane deformation,It is in-dicated from the field analysis of plane deformation accordin8 to the obtained constitutive equations-that this type of materials is of excellent capacity of storing energy.

Two different approaches,theoretical analytical solution and finite element method,were used to study the mechanical properties of a single impacted hexagonal honeycomb cell,and it’s found that for regular honeycombs,the in-plane elastic properties are only determined by the ratio of thickness to length of the cell wall.

Employing the Norton’s power law creep theory and the principle of free energy conservation, the creep-buckling behavior of irregular honeycombs subjected to uniaxial loading is investigated.

Based on the compression-bending coupling stability theory of beam-column,the elastic buckling behavior of honeycombs subject to in-plane biaxial loading is investigated.

Equivalent couple stresses and non-symmetric equivalent stresses are introducedto describe the equivalent constitutive equation of honeycomb materials within plane deformation.

In this paper,the elastic wave propagation in honeycomb materials is investigated based on the dispersion relations.

Application of second-developed ABAQUS/Pre on honeycomb;

By using fast replication, honeycomb strutting piece were fabricated which have different apertures and wall thicknesses, the liquidity of slurry-casting and solidification and dewaxing technologies and powder sintring technologies were investigated.

In this paper, the performances of the honeycomb were investigated, and the approximate curve of stress versus strain and corresponding performances were calculated, when the honeycomb was impacted, which lay the foundation for choosing the honeycomb of the lunar lander and for calculating of the next step.

The result of Gibson s formula that describes equivalent elastic parameters of cellular material is simple and applied easily.

Micropolar equivalent continuum model is established in this paper to capture the non-local properties of cellular materials and to explain the size effects and boundary layer effects observed experimentally.

Basing on the elastic bending theory of beams in large deflection,the non-linear shearing behavior of cellular materials under large deformation is studied in the paper.