Compressive strain rate dependence and constitutive modeling of closed-cell aluminum foams with various relative densities

Numerical Modeling and Experimental Behavior of Closed-Cell Aluminum Foam Fabricated by the Gas Blowing Method under Compressive Loading

“…A rather uniform level of plateau stress, with very slightly increasing slope, occurred around 23 MPa, and densification started around 35 MPa. A densification region and rapid rise of stress began at around 52% of sample deformation, thus indicating acceptable agreement between the energy absorption behavior and results reported in the literature [4,14,41].…”

“…Modeling was carried out under the limitation of a small strain (< 10%), thus densification strain was not achieved for the numerical sample. Modeling of the densification region would require a different simulation model, as shown by the authors of [14]. From Figure 11A,B, it can be observed that shear had a prominent role in the deformation of the sample, and was especially pronounced along the xy and yz planes.…”

“…Aluminum foam has even been studied for use in nuclear transportation due to its energy absorption capabilities [13]. Mechanical behavior under compressive loads has been studied as the most probable loading mode for these foams [14,15,16], as well as at low strain regimes for high porosity foams [17]. Modeling of closed-cell foams, related to dynamic and static loading, is important for understanding and predicting the behavior of these structures [18,19].…”

Mechanical properties and energy absorbing capabilities of Z-pinned aluminum foam sandwich

“…Their work also showed that, in comparison to the static gas injection method, the dynamic gas injection method produced a significantly reduced foam cell size, which resulted in enhanced mechanical properties. In addition, a number of studies have been carried out to determine the mechanical behavior of regular cellular materials [25][26][27][28] and metallic foams [29][30][31][32][33][34][35][36][37] under dynamic load. Guo et al [29] investigated the dynamic behavior of an AFS plate under repeated impacts using drop hammer tests with various energy levels.…”

“…The penetration behavior of the front and back faces was characterized, and the maximum energy absorption was measured after the rupture of the front face. Jing et al [37] studied the compressive mechanical properties of closed-cell aluminum foams under quasi-static and dynamic loading. A multi-parameter constitutive model was proposed to predict stress as a function of the foam relative density, strain, and strain rate.…”