@article{kim_aboubakr_peters_2023, title={Extension of Fiber Bragg Grating Ultrasound Sensor Network by Adhesive Couplers}, volume={10}, ISSN={["2304-6732"]}, url={https://www.mdpi.com/2304-6732/10/12/1366}, DOI={10.3390/photonics10121366}, abstractNote={Previous studies demonstrated coupling of acoustic guided waves from one optical fiber to another through a simple adhesive bond coupler. This paper experimentally utilizes such an adhesive bond coupler to easily extend an already existing sensor network. We experimentally demonstrate this concept for detecting simulated cracks growing from circular holes in a thin aluminum plate. A single, remotely bonded FBG sensor is used to detect the original crack growth, followed by the addition of other optical fiber segments using adhesive couplers to detect new crack growth locations on the plate. A laser Doppler vibrometer is also used to measure the guided wave propagation through the plate to verify that the changes in the FBG sensor measurements are due to the growth of the cracks.}, number={12}, journal={PHOTONICS}, author={Kim, Jee-Myung and Aboubakr, Sherif and Peters, Kara}, year={2023}, month={Dec} }
 @article{aly_aboubakr_bradford_2021, title={One-step fabrication of bulk nanocomposites reinforced by carbon nanotube array fragments}, volume={10}, ISSN={["1548-0569"]}, url={https://doi.org/10.1002/pc.26359}, DOI={10.1002/pc.26359}, abstractNote={AbstractVertically aligned carbon nanotube (VACNT) array growth is an established process where high aspect ratio carbon nanotubes (CNTs) are produced. This work demonstrates one‐step approach to fabricate bulk polymer nanocomposites using CNT array fragments'. Here, 4.5 mm long CNTs were collected post VACNTs synthesis. Next, CNT array fragments were coated with pyrolytic carbon (PyC) and infused with polydimethylsiloxane (PDMS) matrix to create porous CNT/PDMS nanocomposite with a CNT weight fraction of 20%. Achieving similar weight fraction with super long bundled CNTs using dispersion techniques is extremely difficult. The compression and dynamic mechanical behaviors and piezoresistive response of the PDMS filled nanocomposite were assessed. The results revealed the potential of the synthesized structure to serve as fatigue‐resistant pressure sensors with high damping and self‐sensing capabilities. The proposed fabrication technique is versatile, as it can work with thermosetting and thermoplastic polymers in addition to allowing for mass production of PDMS filled nanocomposites.}, journal={POLYMER COMPOSITES}, publisher={Wiley}, author={Aly, Karim and Aboubakr, Sherif H. and Bradford, Philip D.}, year={2021}, month={Oct} }