High Strain Rate Tensile and Compressive Testing and Performance of Mesoporous Invar (FeNi36) Matrix Syntactic Foams Produced by Feedstock Extrusion

2016 ◽  
Vol 19 (11) ◽  
pp. 1600474 ◽  
Author(s):  
Lorenzo Peroni ◽  
Martina Scapin ◽  
Dirk Lehmhus ◽  
Joachim Baumeister ◽  
Matthias Busse ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Syntactic Foams ◽  
Compressive Testing ◽  
And Performance

Effect of hollow sphere size and size distribution on the quasi-static and high strain rate compressive properties of Al-A380–Al2O3 syntactic foams

2013 ◽  
Vol 49 (3) ◽  
pp. 1267-1278 ◽  
Author(s):  
Joseph A. Santa Maria ◽  
Benjamin F. Schultz ◽  
J. B. Ferguson ◽  
Nikhil Gupta ◽  
Pradeep K. Rohatgi
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Size Distribution ◽  
Hollow Sphere ◽  
High Strain ◽  
Syntactic Foams ◽  
Compressive Properties ◽  
Sphere Size

scholarly journals Structural Damages in Syntactic Metal Foams Caused by Monotone or Cyclic Compression

2017 ◽  
Vol 61 (2) ◽  
pp. 146 ◽  
Author(s):  
Bálint Katona ◽  
Imre Norbert Orbulov
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Metal Matrix ◽  
High Strain ◽  
Hollow Spheres ◽  
Syntactic Foams ◽  
Pressure Infiltration ◽  
Cyclic Compression ◽  
Significant Difference ◽  
Strain Rate Compression

Closed cell, high strength metallic foams, like ceramic hollow spheres filled metal matrix foams are promising materials to build lightweight but high specific strength structural parts. The aim of this study is to investigate the damage of the foam structure during monotone or cyclic compression. The tested metal matrix syntactic foams were produced by inert gas pressure infiltration. Four different alloys as matrix and two different ceramic hollow spheres as filler material were applied. The cylindrical specimens were investigated in quasi-static and high strain rate compression and in cyclic compression. The higher strain rates were ensured by a Split-Hopkinson pressure bar system, while the fatigue tests were performed on a closed loop universal hydraulic testing machine. The failure modes of the foams have explicit differences showing barreling and shearing in the case of quasi-static and high strain rate compression respectively. In the case of the fatigue loading, there was a significant difference between the damage mechanisms of the unalloyed and the Si alloyed matrix syntactic foams. This can be explained by the difference between the yield strength of the matrix material and the ceramics hollow spheres.

High strain rate compression of cenosphere-pure aluminum syntactic foams

2007 ◽  
Vol 57 (10) ◽  
pp. 945-948 ◽  
Author(s):  
Z.Y. Dou ◽  
L.T. Jiang ◽  
G.H. Wu ◽  
Q. Zhang ◽  
Z.Y. Xiu ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Pure Aluminum ◽  
Syntactic Foams ◽  
Strain Rate Compression

Nanoclay and Microballoons Wall Thickness Effect on Dynamic Properties of Syntactic Foam

2009 ◽  
Vol 131 (2) ◽  
Author(s):  
Sameer L. Peter ◽  
Eyassu Woldesenbet
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Wall Thickness ◽  
Strain Energy ◽  
High Strain ◽  
Volume Fraction ◽  
Dynamic Properties ◽  
Syntactic Foam ◽  
Syntactic Foams ◽  
Composite Foams

The effect of nanoclay on the high strain rate mechanical properties of syntactic foams is studied. Two types of microballoons with different wall thicknesses are used in fabrication of plain and nanoclay syntactic foams. Plain syntactic foams are fabricated with 60% volume fraction of glass microballoons. 1%, 2%, and 5% volume fractions of Nanomer I.30E nanoclay are incorporated to produce nanoclay syntactic foams. High strain rate test using split Hopkinson pressure bar (SHPB) apparatus is performed on all types of plain and nanoclay syntactic foams. Dynamic modulus, strength, and corresponding strain are calculated using the SHPB data. Quasistatic test is also performed and results are compared with the dynamic SHPB results. The results demonstrate the importance of nanoclay and microballoon wall thickness in determination of syntactic foam dynamic properties. It is found that at a high strain rate, the strength and modulus of composite foams having K46 microballoons increase due to addition of 1% volume fraction of nanoclay. However, in composite foams having S22 microballoons, the increase in strength is not significant at a high strain rate. Further increase in nanoclay volume fraction to 2% and 5% reduces the strength and modulus of composite foams having S22 microballoons. Difference in wall thickness of microballoons is found to affect the strength, modulus, strain energy, and deformation of composite foams. Composite foams fabricated with thicker walled microballoons (K46) show comparatively higher values of strength, modulus, and strain energy compared with thin walled (S22) microballoons. Scanning electron microscopy shows that crack propagation behavior is distinct at different strain rates.

Compressive Properties of Nanoclay-Reinforced Syntactic Foams at Quasi-Static and High Strain Rate Loading

2014 ◽  
Vol 53 (10) ◽  
pp. 990-999 ◽  
Author(s):  
H. Ahmadi ◽  
G. H. Liaghat ◽  
M. M. Shokrieh ◽  
A. Aboutorabi ◽  
H. Hadavinia ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Syntactic Foams ◽  
Compressive Properties ◽  
Strain Rate Loading

Processing and Performance Evaluation of Nanoclay Infused EPON828

2007 ◽  
Author(s):  
Mahesh V. Hosur ◽  
Orion Gebremedhin ◽  
Shaik Jeelani
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Mechanical Analysis ◽  
Thermomechanical Properties ◽  
Clay Nanocomposites ◽  
Strain Rates ◽  
Structured Materials ◽  
Polymer Properties ◽  
And Performance

The field of polymer-clay nanocomposites has attracted considerable attention as a method of enhancing polymer properties and extending their utility. In this research, different nanocomposites have been manufactured by modifying the EPON828 resin system through the infusion of 0.5%, 1%, 1.5% and 2% by weight of clay (Nanocor® 1.30E) nanoparticles. Mechanical properties such as flexural, compressive, tensile and high strain rate strengths and moduli of polymer matrix were improved in nano structured materials owing to their unique phase morphology and improved interfacial interactions. A dynamic Mechanical analysis was performed to monitor changes in the thermal properties of the nanocomposite. Nanoclay reinforced epoxy showed consistent improvement in all the mechanical as well as Thermomechanical properties. High strain rate compressive modulus showed a progressive improvement over the neat values for all the strain rates used. SEM micrographs of the fracture surfaces for both tensile and flexural samples showed regular and continuous patterns of cracks for the neat samples. The nanophased samples on the other hand showed multiple irregular cracks which increased in densities with nanoclay loading.

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