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Metal foam
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In materials science, a metal foam is a material or structure consisting of a solid metal with gas-filled pores comprising a large portion of the volume. The pores can be sealed or interconnected. The defining characteristic of metal foams is a high porosity: typically only 5–25% of the volume is the base metal. The strength of the material is due to the square–cube law.
Foamed aluminium
Foamed aluminium
Regular foamed aluminium
Regular foamed aluminium
Manufacturing process of a regular metal foam by direct molding, CTIF process
Manufacturing process of a regular metal foam by direct molding, CTIF process
As the strain and applied load on composite metal foam increases, the ability to withstand stress grows. Unlike solid materials that reach their ultim
As the strain and applied load on composite metal foam increases, the ability to withstand stress grows. Unlike solid materials that reach their ultimate strength very quickly, composite metal foam slowly builds to its ultimate strength, absorbing energy in the process.
Foam
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Foams are materials formed by trapping pockets of gas in a liquid or solid.
Soap foam bubbles
Soap foam bubbles
Cleaning sponge
Cleaning sponge
Top of a foamy drink
Top of a foamy drink
Schematic stress-strain curve of an elastomeric foam, demonstrating the three regions which are linear elastic, cell-wall buckling, and cell-wall frac
Schematic stress-strain curve of an elastomeric foam, demonstrating the three regions which are linear elastic, cell-wall buckling, and cell-wall fracture. The area under the curve specified represents the energy per unit volume the foam can absorb.