Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 454, Issue -, Pages 542-546Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2006.11.091
Keywords
closed-cell; aluminum foam; cell diameter; peak stress; compression; energy absorption
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The quasi-static compressive mechanical behavior and deformation mechanism of closed-cell aluminum foam were researched, and the effect of cell diameter of aluminum foam on compressive and energy absorption properties was also discussed. Results show that the compressive process of closed-cell aluminum foam is characterized by three deformation stages: linear elastic stage, plastic collapse stage and densification stage. The effect of cell diameter on its compressive property is obvious: with the increasing cell diameter, the peak stress (sigma(0)) and nominal Young's modulus (E-0.2) increase, energy absorption capability increases, however the energy absorption efficiency decreases and becomes more and more unstable. At the same time, the compressive specimen is also affected by the size effects obviously: when L/d >= 6, the compressive property of closed-cell aluminum foam is reproducible. (c) 2006 Elsevier B.V. All rights reserved.
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