Shearing Fracture Mechanism of Foam Aluminum Sandwich

Abstract:

Core cracking and face/core separation (debonding) are common failure modes in foam cored sandwich structures, aluminum alloy foam sandwich is prepared in this experiment, shearing tests were conducted on precursor and sandwich panel specimens. Shearing test results showed if the porosity was not uniform and have super-big pores, the interface was not firmly；and porosity was uniform, so the bonding interface was tightly and under force the strength of aluminum sheet was lower than the foam core/aluminum sheet interface. Analysis the results fracture pattern of aluminum sheet/powders interface belongs to interface brittle debonding; and if the strength of pore wall was lower than aluminum face sheet, fracture pattern of foam core/aluminum sheet began ductile and transited to cleavages fracture.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 1037-1040
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.1037
• Online since: February 2012
• Authors: Min Zhang, Chang Jun Chen, Guo Yin Zu, Guang Chun Yao
• Keywords: Foam Aluminum Sandwich, Fracture Machanism, Shearing Test

References

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