Theoretical Model of Spherical Pore Al Alloy Foam Core Under Uniaxial Compression

The stress versus strain curves, energy absorption capacity and energy absorption efficiency of spherical pore Al alloy foam (Pr≤65%) under uniaxial compression are investigated. Compressive stress-strain curve of Al alloy foam consists of three distinct regions: the linear elasticity region, the plastic collapse region, the densification region. Compared with polygonal pore Al alloy foam, the mechanical properties of spherical pore are relatively higher: Yield stress of spherical pore Al alloy foam is higher, The energy absorption capability of spherical pore A1 alloy foam is stronger. The relationship between yield stress and porosity is obtained with spherical self-consistent model. The prediction for yield stress of spherical pore Al alloy foam is in agreement with the experimental results.