Indentation Behavior of a Closed-Cell Aluminum Foam at Elevated Temperatures

Abstract

A series of deep indentation and uniaxial compression tests of closed-cell aluminum foams at room temperature as well as elevated temperatures were conducted. A flat-ended punch (FEP) was used in the indentation tests. Cross-sectional views of the specimens after tests show that the deformation is roughly confined to the material directly underneath the indenter with slightly lateral spread. It is found that plastic collapse strength and energy absorption of the specimens are temperature dependent in both loading conditions. Tear energy of the foam in FEP indentation depends on the indentation depth and temperature.

Impact response and energy absorption of functionally graded foam under temperature gradient environment

“…and Tm denotes the melting temperature of the base material from which the foam material is made, and αm denotes a material constant [54]. It should be noted that the maximum external temperature considered in this paper should not be larger than the value of Tm.…”

“…, in which B5 = 1 [39] and m  = 1 [54] are adopted in this numerical analysis. A large tangent modulus Et = 0.1Ed is employed as the compressive strain is larger than the densification strain and the elastic Poisson's ratio is fixed at νe = 0.3.…”

Quasi-Static Indentation Properties of Aluminium Foam-Frp Sandwich Panel

“…Sandwich structures are widely being used in aircraft, automotive, aerospace and marine industries where lightweight materials with high in-plane and flexural stiffness are required [1]. It is constructed based on low weight and thick core material bonded with two thin and stiff face sheets [2].…”