Functionally Graded Syntactic Foams with Layers of Dissimilar Metallic Matrices

Function of functionally-graded (FG) foams as energy absorption material for impact was discussed on the basis of theoretical analysis, and fabrication process of the foams was proposed in the paper. The FG foams were found to be useful as impact absorber due to progressively local fracture or cushion in the theoretical analysis. Next the fabrication process of the FG foams was suggested. The graded dispersion of the micro-balloons was conducted before curing the matrix resin in the process. The density distributions in the FG foams were confirmed to be predicted by the numerical analysis on the basis of floating the micro-balloons. Finally, compression tests were carried out to evaluate mechanical properties.

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Fatigue characterization of functionally graded ZA27 alloy syntactic foams

Materials Science and Engineering A ◽

10.1016/j.msea.2020.140255 ◽

2020 ◽

Vol 798 ◽

pp. 140255

Author(s):

Nima Movahedi ◽

Imre Norbert Orbulov ◽

Alexandra Kemény ◽

Irina V. Belova ◽

Graeme E. Murch ◽

...

Keyword(s):

Functionally Graded ◽

Syntactic Foams ◽

Za27 Alloy

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Controlling of Distribution of Mechanical Properties in Functionally-Graded Syntactic Foams for Impact Energy Absorption

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.729 ◽

2012 ◽

Vol 706-709 ◽

pp. 729-734 ◽

Cited By ~ 7

Author(s):

Masahiro Higuchi ◽

Tadaharu Adachi ◽

Yuto Yokochi ◽

Kenta Fujimoto

Keyword(s):

Mechanical Properties ◽

Density Distribution ◽

Energy Absorption ◽

Impact Energy ◽

Volume Fraction ◽

Functionally Graded ◽

Syntactic Foams ◽

Compression Tests ◽

Density Distributions ◽

Control Distribution

In the study, novel fabrication processes of functionally-graded (FG) syntactic foams were developed to control distribution of the mechanical properties in the FG foams for highly impact energy absorption. In order to control mechanical properties, the density distributions in FG foams were graded by floating phenomenon of the light-weight micro-balloons in matrix resin during curing process. The density distribution in the foam could be controlled by adjusting the average volume fraction and the turning procedure of the mold before grading the micro-balloons in the foam. The compression tests of the fabricated FG foams suggested that the foams had high absorption of impact energy since the foams collapsed progressively due to the grading of the density distribution.

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OS1712 Evaluation on Mechanical Properties of Functionally-Graded Syntactic Foams

The Proceedings of the Materials and Mechanics Conference ◽

10.1299/jsmemm.2011._os1712-1_ ◽

2011 ◽

Vol 2011 (0) ◽

pp. _OS1712-1_-_OS1712-2_

Author(s):

Masahiro HIGUCHI ◽

Tadaharu ADACHI

Keyword(s):

Mechanical Properties ◽

Functionally Graded ◽

Syntactic Foams

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705 Controlling of composition in functionally-graded syntactic foams

The Proceedings of Conference of Tokai Branch ◽

10.1299/jsmetokai.2011.60._705-1_ ◽

2011 ◽

Vol 2011.60 (0) ◽

pp. _705-1_-_705-2_

Author(s):

Yuto YOKOCHI ◽

Masahiro HIGUCHI ◽

Tadaharu ADACHI

Keyword(s):

Functionally Graded ◽

Syntactic Foams

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Compressive and flexural properties of functionally graded fly ash cenosphere-epoxy resin syntactic foams

Polymer Composites ◽

10.1002/pc.22987 ◽

2014 ◽

Vol 36 (4) ◽

pp. 685-693 ◽

Cited By ~ 32

Author(s):

Mrityunjay Doddamani ◽

Kishore ◽

Vasanth Chakravarthy Shunmugasamy ◽

Nikhil Gupta ◽

H.B. Vijayakumar

Keyword(s):

Fly Ash ◽

Epoxy Resin ◽

Functionally Graded ◽

Flexural Properties ◽

Syntactic Foams ◽

Fly Ash Cenosphere

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Quasi-State Compressive Properties of Functionally Graded Aluminum Matrix Syntactic Foams

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1035.878 ◽

2021 ◽

Vol 1035 ◽

pp. 878-883

Author(s):

Ming Ming Su ◽

Mo Qiu Li ◽

Thomas Fiedler ◽

Hai Hao

Keyword(s):

Volume Fraction ◽

Hollow Spheres ◽

Aluminum Matrix ◽

Stir Casting ◽

Functionally Graded ◽

Small Range ◽

Syntactic Foams ◽

Compression Tests ◽

Static Compression ◽

Plateau Stress

The uniform aluminum matrix syntactic foams (SFs) were prepared by the stir casting method, with alumina hollow spheres (2-3 mm and 3-4 mm) and expanded glass (2-3 mm) as reinforcements, and ZL111 aluminum alloy as matrix. The functionally graded aluminum matrix syntactic foams (FG-SFs) were obtained by superimposing two uniform aluminum matrix syntactic foams. Quasi-static compression tests were performed. The plateau stress of FG-SFs containing only hollow spheres decreased slightly with increasing volume fraction of SF containing 3-4 mm hollow spheres. The FG-SFs containing 2-3 mm hollow spheres and 2-3 mm expanded glass showed the highest plateau stress. The energy absorption behavior of all samples fluctuated in a small range. The initial position of shear band depended on the volume fraction of uniform aluminum matrix syntactic foams, reinforcement type and size. The cracks always appeared first in the uniform aluminum matrix syntactic foams containing expanded glass.

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Development of Integral Molding of Functionally-Graded Syntactic Foams

Advanced Dynamics and Model-Based Control of Structures and Machines ◽

10.1007/978-3-7091-0797-3_1 ◽

2011 ◽

pp. 1-9 ◽

Cited By ~ 6

Author(s):

Tadaharu Adachi ◽

Masahiro Higuchi

Keyword(s):

Functionally Graded ◽

Syntactic Foams

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Functionally-Graded Metallic Syntactic Foams Produced via Particle Pre-Compaction

Metals ◽

10.3390/met10030314 ◽

2020 ◽

Vol 10 (3) ◽

pp. 314 ◽

Cited By ~ 5

Author(s):

Thomas Fiedler ◽

Nima Movahedi ◽

Lucas York ◽

Steffen Broxtermann

Keyword(s):

Syntactic Foam ◽

Functionally Graded ◽

Syntactic Foams ◽

Compression Tests ◽

Graded Materials ◽

Static Compression ◽

X Ray Imaging ◽

Foam Properties ◽

A356 Aluminum ◽

Particle Beds

This paper introduces a novel functionally graded metallic syntactic foam. The investigated foams are manufactured while using infiltration casting where molten A356 aluminum flows into the interstitial voids of packed expanded perlite (EP) particle beds. The partial pre-compaction of particle beds enables the creation of distinct and reproducible density gradients within the syntactic foam. In this study, the samples are produced using four gradually increasing compaction forces and are compared to non-compacted samples. X-ray imaging is used to detect the resulting spatial variation of foam density. In addition, quasi-static compression tests are performed to determine the mechanical foam properties. The results suggest that particle pre-compaction is an efficient tool for tailoring the density and mechanical properties of these novel functionally graded materials.

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