Techno Press


Steel and Composite Structures   Volume 21, Number 5, August10 2016, pages 1145-1156
DOI: http://dx.doi.org/10.12989/scs.2016.21.5.1145
 
Effects of foam core density and face-sheet thickness on the mechanical properties of aluminum foam sandwich
Chang Yan and Xuding Song

 
Abstract     [Full Text]
    To study the effects of foam core density and face-sheet thickness on the mechanical properties and failure modes of aluminum foam sandwich (AFS) beam, especially when the aluminum foam core is made in aluminum alloy and the face sheet thickness is less than 1.5 mm, three-point bending tests were investigated experimentally by using WDW-50E electronic universal tensile testing machine. Load.displacement curves were recorded to understand the mechanical response and photographs were taken to capture the deformation process of the composite structures. Results demonstrated that when foam core was combined with face-sheet thickness of 0.8 mm, its carrying capacity improved with the increase of core density. But when the thickness of face-sheet increased from 0.8 mm to 1.2 mm, result was opposite. For AFS with the same core density, their carrying capacity increased with the face-sheet thickness, but failure modes of thin face-sheet AFS were completely different from the thick face-sheet AFS. There were three failure modes in the present research: yield damage of both core and bottom face-sheet (Failure mode I), yield damage of foam core (Failure mode II), debonding between the adhesive interface (Failure mode III).
 
Key Words
    aluminum foam sandwich; three-point bending; mechanical properties; deformation; failure mode
 
Address
Key Laboratory of Road Construction Technology & Equipment of Chang\'an University, MOE, Xi\'an, Shaanxi 710064, China.
 

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