Novel Cellular Structures and Sandwich Materials
We investigated the mechanical behavior of two-dimensional hierarchical honeycomb structures using analytical, numerical and experimental methods. Hierarchical honeycombs are constructed by replacing every three-edge vertex of a regular hexagonal lattice with a smaller hexagon. Repeating this process builds a fractal-appearing structure. The stiffness and strength of this structure is controlled by the iteration of dimensional ratios for different hierarchical orders. Hierarchical honeycombs of the first and second order can be up to 2 and 3.5 times stiffer than regular honeycombs at the same mass (i.e., same overall average density). The specific strength (based on plastic collapse) of the hierarchical honeycomb structures is similar to that of regular honeycomb structures.
Our results could help better understand the behavior and function of engineered and biological cellular materials, and develop a new class of energy absorbent cellular structures.F4-J Project Overview: ALERT Year 4 Annual Report
Faculty and Staff Currently Involved in Project
Associate Research Scientist
Students Currently Involved in Project
- Amin Ajdari
- Hamid Ebrahimi