Failure modes and influence of the quasi-static deformation rate on the mechanical behavior of sandwich panels with aluminum foam cores

Abstract

Themainpurposeofthisworkistostudythebendingbehavior and deformation mechanisms of sandwich panels with AlSi7-alloy foam cores obtained by the powder metallurgy method. For this purpose, quasi-static three-point bending tests were performed on samples of AlSi7-alloy foam sandwich panels at different crosshead displacement rates: 1, 10, 20, 40 and 80 [mm/min]. Loaddeflection values were registered during the bending test and furthertransformedintobendingmoment–rotationdata.Obtained results show that different failure collapse modes can be obtained for samples with identical nominal dimensions, depending on the cross-head displacement rate.