Compressive Response and Mechanical Properties of Closed-cell Aluminum Foam
|關鍵字:||封閉式泡沫鋁;微觀結構;受壓力學反應;微電腦斷層掃描;機械性質;數值模擬;closed-cell foam;microstructure;compressive response;micro-CT;mechanical property;numerical simulation|
This study aims to investigate the cellular microstructure of closed-cell aluminum foam and its relation to the foam mechanical response by means of experimental and numerical efforts. Microstructural characterization on cell morphology is first systematically performed from which geometric features are measured and recorded. Such information not only enhances the understanding of the cellular microstructure but also helps greatly on the development of representative numerical models. Crushing experiments are subsequently conducted in order to access the mechanical properties for foam specimens under various testing conditions. Meanwhile, a micro-CT scanner is incorporated to monitor the evolution of deformation patterns in the cellular microstructure during the crushing tests. A series of numerical models, based on the measured microstructural features, are used to reproduce mechanical parameters. Simulated numerical results are compared with experimental ones and the effect of each of the imperfections observed on the foam mechanical response is investigated accordingly.
|Appears in Collections:||Thesis|