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Free vibration analysis of aluminum foam sample is performed in the present paper. Mechanical properties of metal- lic foams depend on their relative densities. The discrete mass distribution of metallic foam causes discontinuities in their local properties. X-ray computer tomography (XCT) revealed the 3-D inhomogeneous mass distribution in metallic foams. The densi- ty mapping method is used to approximate the aluminum foam trade name ALPORAS by a continuous, 3-D density distribu- tion at the mesolevel. The density recorded by XCT is homogenized over an averaging volume. A continuum model is imple- mented using the finite element (FE) method to simulate the effect of local mass distribution on the modal behavior of metallic foam sample. The effect of measured density distributed model (MDDM) Coarse sub-domain density model (CSDM), uniform average density model (UADM), and three random distributed density model (RDDM) on eigen frequencies of the aluminum foam sample is studied. Density distribution of aluminum foam measured by X-ray computer tomography was used as input to the corresponding FE model of investigated specimen. All numerical investigations were carried out by means of the FE pack- age ANSYS.

Effect of local mass distribution on modal behavior of Aluminum foam