A 3D mesoscopic model for the closed-cell metallic foams subjected to static and dynamic loadings

This article is aimed to reveal the dynamic response of layered graded metallic foam under impact loading using a three-dimensional mesoscopic model. First, a mesoscopic model for closed-cell metallic foam is proposed based on the X-ray computed tomography images. Second, a numerical analysis approach is presented and validated with test data. Third, it studies the dynamic behavior of the layered graded metallic foam under impact loading numerically. The metallic foam specimen is composed layer by layer. The porosity, which is a fraction of the voids volume over the total volume, is different with each other for the layers. Simulations are conducted to the specimen with increasing and decreasing porosity arrangement. Results show that the layer arrangement is critical to the dynamic properties. The mesoscopic deformation of cell walls and the energy absorption capability are also affected significantly. This article gives insights into the mechanical properties and mesoscopic deformation of layered graded metallic foam.

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Modeling and computing parameters of three-dimensional Voronoi models in nonlinear finite element simulation of closed-cell metallic foams

Mechanics of Advanced Materials and Structures ◽

10.1080/15376494.2016.1190426 ◽

2016 ◽

Vol 25 (15-16) ◽

pp. 1265-1275 ◽

Cited By ~ 3

Author(s):

Xiaoyang Zhang ◽

Yidong Wu ◽

Liqun Tang ◽

Zejia Liu ◽

Zhenyu Jiang ◽

...

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Three Dimensional ◽

Nonlinear Finite Element ◽

Metallic Foams ◽

Element Simulation ◽

Closed Cell ◽

Nonlinear Finite Element Simulation

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Resistance of Thin Al Foam Panels to Deep Indentation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.561-565.357 ◽

2007 ◽

Vol 561-565 ◽

pp. 357-360 ◽

Cited By ~ 1

Author(s):

Maizlinda I. Idris ◽

Tania Vodenitcharova ◽

Mark Hoffman

Keyword(s):

Uniaxial Compression ◽

Bulk Material ◽

Deformation Behaviour ◽

Metallic Foams ◽

Closed Cell ◽

Crushing Force ◽

Indentation Tests ◽

Al Foam ◽

Deep Indentation ◽

Combined Action

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.

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Processing of Closed-Cell Magnesium Foams

Materials Science Forum ◽

10.4028/www.scientific.net/msf.539-543.1839 ◽

2007 ◽

Vol 539-543 ◽

pp. 1839-1844 ◽

Cited By ~ 3

Author(s):

Koichi Kitazono ◽

Yusuke Kikuchi ◽

Eiichi Sato ◽

Kazuhiko Kuribayashi

Keyword(s):

Cell Morphology ◽

Solidus Temperature ◽

Bonding Process ◽

Metallic Materials ◽

Metallic Foams ◽

Magnesium Matrix Composite ◽

Magnesium Matrix ◽

Acoustic Damping ◽

Blowing Agent ◽

Closed Cell

Lightweight metallic foams are an attractive material having excellent energy absorption and acoustic damping. The density of magnesium is the smallest among structural metallic materials, and is about two third of the density of aluminum. It is, however, difficult to produce magnesium foams by conventional process because of their chemical activity. This paper provides a novel manufacturing process of magnesium foams. Accumulative diffusion-bonding process can produce a magnesium matrix composite (preform) containing titanium hydride (TiH2) particles as a blowing agent. Foaming tests of three magnesium alloys, AZ31, AZ91 and ZA146, revealed that low solidus temperature is effective to produce fine cell morphology. Chemical composition is significantly important to optimize the cell morphology of magnesium foams.

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