Resistance of Thin Al Foam Panels to Deep Indentation

Maizlinda I. Idris; Tania Vodenitcharova; Mark Hoffman

doi:10.4028/www.scientific.net/MSF.561-565.357

Paper Titles

Investigation of Streaking Defects on Aluminium Extrusions
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Integrating Process, Material and Business Strategies to Transform a Small-Medium Aluminium Products Manufacturer
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On-Line Aging to Improve the Tensile Strength and Conductivity of Cold-Drawing AA6201 Wires
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From Angel Food Cake to Porous Titanium – A Novel Powder Metallurgical Approach for Metallic Foam Utilizing Food Processing and Ceramic Processing Techniques
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Resistance of Thin Al Foam Panels to Deep Indentation
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Preparation of the Al-Cu-Co and Al-Cu-Ni Ternary Intermetallic Powders via a Solid-Liquid Reaction Ball Milling Technique
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Preparation of Ti-Al Intermetallics by Aluminum Melt Infiltration-Diffusion Annealing Technique
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Oxidation Behavior and Pack Siliconized Oxidation-Resistant Coatings of an Nb-Based Ultrahigh Temperature Alloy
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Microstructure and Mechanical Properties of Dual Multi-Phase Intermetallic Alloys Composed of Geometrically Close Packed Ni₃X Structures
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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Resistance of Thin Al Foam Panels to Deep...

Resistance of Thin Al Foam Panels to Deep Indentation

Abstract:

In recent years there has been a considerable amount of research into the deformation behaviour of metallic foams. The majority of this research has only addressed size-independent bulk material properties, obtained through uniaxial compression and indentation tests of thick blocks. There is little information in the literature on the indentation response of thin panels, which has motivated the current study. Thin panels of ALPORAS closed-cell foam of ~ 0.25 g/cm3 density were tested in uniaxial compression, and were indented with long flat-plate punches and long cylindrical punches. Cross-sectioning of the samples following interrupted testing revealed the plastic strain evolution process. The deformation was attributed to the progressive crushing of the cell bands, and the combined action of shearing and tearing resistance. Based on energy formalism, a model was developed to estimate the crushing force. By fitting the experimental loaddisplacement curves, the foam ligament tearing energy was deduced for all types of indentation. The absorbed energy was also calculated for the uniaxial compression and indentation experiments.