Journal
JOM
Volume 71, Issue 4, Pages 1520-1527Publisher
SPRINGER
DOI: 10.1007/s11837-019-03355-5
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Funding
- Summer Undergraduate Research Program at NYU-Tandon
- 3DP Security, Inc.
- DST from Government of India [DST/TSG/AMT/2015/394/G]
- ME Department at NIT-K
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High-density polyethylene and its syntactic foams reinforced with 20vol.% and 40vol.% glass microballoons were 3D printed using the fused filament fabrication method and studied for their compressive response. The three-phase microstructure of syntactic foams fabricated in this work also contained about 10vol.% matrix porosity for obtaining light weight for buoyancy applications. Filaments for 3D printing were developed using a single screw filament extruder and printed on a commercial 3D printer using settings optimized in this work. Three-dimensional printed blanks were machined to obtain specimens that were tested at 10(-4)s(-1), 10(-3)s(-1), 10(-2)s(-1) and 1s(-1) strain rates. The compression results were compared with those of compression-molded (CM) specimens of the same materials. It was observed that the syntactic foam had a three-phase microstructure: matrix, microballoons and air voids. The air voids made the resulting foam lighter than the CM specimen. The moduli of the 3D-printed specimen were higher than those of the CM specimens at all strain rates. Yield strength was observed to be higher for CM samples than 3D-printed ones.
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