Abstract
Aluminum matrix syntactic foams(AMSF) are lightweight composite foams with functional and structural properties such as low relative density and high energy absorbing nature. These qualities made AMSFs a practical alternative to conventional materials desirable for automotive, aerospace and shipbuilding industries as energy absorbers. Many studies have reported the mechanical aspects of these materials. However, a detailed analysis of energy-absorbing behavior on aluminum matrix syntactic foams is sparse. This work produces alumina-reinforced aluminum syntactic foams using the powder metallurgy route. A systematic study on quasi-static room temperature (RT) and elevated temperature (ET) is conducted to understand the effect of the volume fraction and size of the particle individually. The compressive stress-strain response shows volume fraction and temperature dependency for different particle size ranges. The maximum densification strain (RT-58% and ET- 55%) and energy absorption efficiency (RT- 70.61% and ET-75.77%) of samples tested in quasi-static- RT and ETs are observed, respectively. Despite large deformation, no sudden drop in stress-strain response and macroscopic stability were observed in the samples.
Published Version
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