A Study on Dynamic Properties of Composite Metal Foams

Report No. ARL-CR-706
Authors: Afsaneh Rabiei; Vincent H. Hammond
Date/Pages: December 2012; 18 pages
Abstract: Composite metal foam is a new class of closed cell metal foam offering higher energy absorption compared to the monolithic material at approximately one-third of the density. The superior energy absorption capability of composite metal foam makes this material a potential candidate for structural components such as automotive crash box and crumple zones. However, a systematic study on the dynamic properties of composite metal foams is necessary before they can be utilized in vehicular structures. It has been reported that the energy absorption of other metal foams will increase by increasing the strain rate up to 4× at impact speeds of up to 200 m/s. In this study, the dynamic properties of composite metal foams under various impact speeds are obtained through a variety of experimental techniques. Subsequently, there results are compared to those published in the literature for other foams tested at various impact rates.
Distribution: Approved for public release
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Last Update / Reviewed: December 1, 2012