Effect of Cell Size on the Dynamic Compressive Properties of Open-Celled Aluminum Foams

Abstract

In the present paper, open-celled AA6101-T6 aluminum foams, Duocel, with virtually the same relative density of 0.09 were tested at both a dynamic strain rate of 1.2×10 3 s −1 and quasi-static strain rate of 1×10 −3 s −1 in compression at room temperature. These Duocel foams have different cell sizes (10, 20, and 40 ppi) but similar cell morphology and microstructure. The mechanical strength and energy absorption of these foams were characterized as a function of strain rate and cell morphology. Experimental results indicated that the mechanical responses of Duocel foams were independent of the cell size and strain rate. Similar tests were also conducted with fully dense AA6101-T6 aluminum alloy and the results were compared with those obtained from the foam materials.

In-Plane Compression Response of Regularly Cell-Structured Materials

“…[3][4][5][6][7] Recently, a cellular solid becomes more attractive for multifunctional applications, where high loading capacity is required together with other functionalities: e.g., ultra-light structure for compact cooling, energy absorption and vibration control. 8) This material design requires a structural topological design for efficient heat capacity together with loading capacity in the most efficient manner.…”

The Mechanical Properties and the Influence of Parameters for Metallic Closed-Cell Foam Subjected to High-Strain Rates

“…In their work they concluded that the fatigue amplitude was nearly independent of both the relative density and the mean stress. Kanahashi et al [2] performed dynamic compressive experiments to determine the effect of the pore size for aluminium foam material. In their work they pointed out that, for the material they tested, the static and dynamic response remained nearly unchanged for different pore sizes if the relative density was constant.…”

Fabrication of SUS304 Regularly Cell-Structured Material and Their Mechanical Properties

“…Beyond the linear region, plastic yielding takes place up to 60% in compressive strain, corresponding to the conventional cellular structures. [4][5][6]17) A positive slope was detected in the collapse region: d c =d" c % 40 MPa. It was slightly different from the conventional honeycomb materials.…”

“…4. Just like the local buckling in foam material, [4][5][6] this local detachment never leads to the total failure by the plastic deformation of tubes. In the same manner to the plateau stress region in the metallic foam, nearly constant stress is preserved till the onset of densification.…”

“…This feature leads to high-energy absorption capacity in the crash and blast amelioration systems. [4][5][6] Theoritical stiffness and strength have been studied both for the closed-cell and open-cell materials in the literature. [7][8][9] The Young's modulus (E) and yield stress ( y ) of the closedcell materials have linear relationship with its relative density, R .…”