Ms. Susan M. Rankin Profile

Susan M. Rankin

at Oak Ridge National Lab.

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Proceedings Article | 22 March 2021 Presentation + Paper

Passive sensing of a microparticle modified hybrid, fiber-reinforced composite

Christopher Bowland, Sumit Gupta, Susan Rankin, Amit Naskar

Proceedings Volume 11592, 115920B (2021) https://doi.org/10.1117/12.2582746

KEYWORDS: Nanoparticles, Mechanical sensors, Deposition processes, Ceramics, Composites, Passive remote sensing, Carbon, Thin film coatings

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The widespread commercial adoption of high-performance, fiber-reinforced composites has pushed research interests toward the next generation of composites. These new composites are tasked with integrating additional functionalities into the structures without causing a trade-off in mechanical performance. One such functionality that has received significant interest is sensing. This is especially important for composites using high-performance fibers (e.g., carbon fiber) because their strain-to-failure is relatively low, resulting in brittle fracture. Besides, fiber damage can be hidden within the composite, potentially leading to premature catastrophic failure if not detected. In prior research, we demonstrated continuous feed-through deposition of ceramic nanoparticles on carbon fiber’s surface that simultaneously enhanced both the piezoresistive response and interlaminar shear strength. In this work, a similar continuous feed-through deposition process was used to demonstrate passive sensing and energy harvesting by integrating ferroelectric microparticles on the surface of electrically nonconductive fibers. The sensing and energy harvesting capabilities were characterized by mechanically straining composite beams and measuring the power generated. The improvements in mechanical properties are shown through interlaminar shear strength tests. Therefore, this research aims to demonstrate a high throughput, commercially scalable approach to coat fibers with ferroelectric microparticles that enable passive sensing as well as improved mechanical performance when fabricated into a fiber-reinforced composite.

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