Carbon-Nanofiber-Reinforced Syntactic Foams: Compressive Properties and Strain Rate Sensitivity
作者： Ronald L. Poveda , Nikhil Gupta
DOI: 10.1007/S11837-013-0791-0
关键词: Syntactic foam 、 Compressive strength 、 Microstructure 、 Carbon nanofiber 、 Epoxy 、 Deformation (engineering) 、 Materials science 、 Strain rate 、 Composite material 、 Volume fraction
摘要: The current study is focused on exploring the possibility of reinforcing syntactic foams with carbon nanofibers (CNFs). Syntactic are hollow, particle-filled composites that widely used in marine structures and now finding applications other modes transportation due to their high stiffness-to-weight ratio. compressive properties reinforced CNFs characterized over strain rate range 10−4 3,000 s−1, which covers seven orders magnitude. results show despite lower density respect neat epoxy, CNF/syntactic can have up 7.3% 15.5% higher quasi-static strength modulus, respectively, for compositions were study. In addition, these be tailored a wide by means hollow particle wall thickness volume fraction, CNF fraction. also shown generally increase factor 3.41 increasing when high-strain-rate testing data compared. Extensive microscopy conducted understand failure energy absorption mechanisms. Crack bridging observed specimens, delay final capacity specimens. Deformation noticed material microstructure. deformation mechanisms related test structure CNFs.
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