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CSME 2025/10
Volume 46 No.5
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485-493
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A Comparison of the Effect of Carbon Fiber and Silica Aerogel on Epoxy Composite Materials
Ze-Han Chen a, Ching-Lin Chen a, Ming-Horng Lin b and Tao-Hsing Chen b
aGraduate Student, Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan 807618, ROC.
bProfessor, Department of Mechanical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan 807618, ROC
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Abstract:
In this study, silica aerogel and short carbon fiber are added as reinforcements into NC826 epoxy resin to provide nano-macromolecular composite materials. The materials are subject to static compression and dynamic impact tests under various strain rates using a universal testing machine and Hopkinson bar. Field emission scanning electronic microscopy (FE SEM) is then used to obtain fractography to explore the mechanism of interfacial fracture and the dispersion of the reinforcements.
In the static test, the highest stress was obtained from the epoxy resin composite material with 0.4wt% short carbon fiber; in the dynamic test, it was obtained from the material with 0.6wt% carbon fiber. The SEM fractography shows that the addition of reinforcements in an appropriate amount is effective in improving the strength of epoxy resin, preventing the growth of existing cracks, and the transferring the stress along the substrate. Excess reinforcements can cause poor dispersion, leading to aggregation and loss of strength.
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Keywords: silica aerogel, carbon fiber, universal testing machine, Hopkinson bar
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©
2025
CSME , ISSN 0257-9731
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