Effect of Cellular Structure of A356-10 vol.%SiC Composite Aluminum Foam on Progressive Quasi-Static Axial Buckling Behavior of Brass Crush-Box

In this paper، the behavior of energy absorption of crush-boxes، made of Aluminum foam advanced material، was investigated based on foam cellular structure homogeneity. Therefore، thin-walled tubes of Cu-Zn30wt. %. brass alloy with 27 mm diameter and 1 mm thickness were filled with A356-10vol. %SiC-Xwt. %. of TiH2 foam liquid. Foam samples with 1، 1. 5، 2wt. %. of TiH2 were prepared by Form Grip into the brass tubes in order to produce crush-box. Then the crush-boxes as energy absorber elements were compressed by un-axial loading and then behaviors of progressive buckling foams were measured. Results showed by decreasing A356-10vol. % SiC foam density from 0. 93 to 0. 88 and then 0. 43 g/cm3، the energy absorption would be changed from 12955 to 13465 and then to 11192 J، respectively. The sample with 1. 5wt. % of TiH2 and density of 0. 88 g/cm3 had the maximum energy absorption. Also، the results of foams cellular structure images showed that foams of homogenous cellular structure had a sizeable effect on the progressive buckling behavior. We developed a new parameter as «sorting coefficient»، which can release the foams cellular structure non-homogeneity، and change the crush-boxes energy absorption during the progressive plastic buckling.