@article{debois_agarwal_kapoor_mathur_2022, title={Tribology of the sock-skin Interface - the influence of different fabric parameters on sock friction}, volume={15}, ISSN={["1757-1146"]}, DOI={10.1186/s13047-022-00560-5}, abstractNote={AbstractBackgroundThe purpose of this parametric design of experiments was to identify and summarize how the influence of knit structure (single jersey vs. terry), fiber composition (polyester vs. cotton), fiber linear density (30/1 Ne vs. 18/1 Ne & 1/150/34 vs. 2/150/34), and yarn type (filament vs. spun) affected the frictional profile across the sock‐skin interface.MethodsFriction testing trials were completed against both a polypropylene probe and a synthetic skin material (Lorica soft®) to determine if there was a difference in friction based on interface interaction. Friction testing was completed by sliding a probe across the inside bottom surface of the sock (the part that is usually in‐contact with the bottom of the foot) while instantaneously measuring the frictional force every tenth of a second.ResultsFor both trials (plastic probe and synthetic skin), in the dry condition, knit structure was found to be the most prominent fabric parameter affecting the frictional force experienced at the sock‐skin interface. It was also determined that fiber linear density, and yarn type are tertiary factors affecting the frictional force measured at the sock‐skin interface. Finally, in the dry state, it was determined that fiber composition had seemingly no effect on the frictional force experienced at the sock‐skin interface.ConclusionThis parametric design of experiments has further enhanced the understanding of the tribology at the sock‐skin interface. Through strategic design, four different textile parameters have been investigated, measured, and justified as to how each influence the friction measured between the two interfaces. This knowledge can be used to develop socks that mitigate the risk of friction blisters formation.}, number={1}, journal={JOURNAL OF FOOT AND ANKLE RESEARCH}, author={DeBois, Ian J. and Agarwal, Esha and Kapoor, Ashish and Mathur, Kavita}, year={2022}, month={Aug} }
 @article{tabor_agcayazi_fleming_thompson_kapoor_liu_lee_huang_bozkurt_ghosh_2021, title={Textile-Based Pressure Sensors for Monitoring Prosthetic-Socket Interfaces}, volume={21}, ISSN={["1558-1748"]}, url={https://doi.org/10.1109/JSEN.2021.3053434}, DOI={10.1109/JSEN.2021.3053434}, abstractNote={Amputees are prone to experiencing discomfort when wearing their prosthetic devices. As the amputee population grows this becomes a more prevalent and pressing concern. There is a need for new prosthetic technologies to construct more comfortable and well-fitted liners and sockets. One of the well-recognized impediments to the development of new prosthetic technology is the lack of practical inner socket sensors to monitor the inner socket environment (ISE), or the region between the residual limb and the socket. Here we present a capacitive pressure sensor fabricated through a simple, and scalable sewing process using commercially available conductive yarns and textile materials. This fully-textile sensor provides a soft, flexible, and comfortable sensing system for monitoring the ISE. We provide details of our low-power sensor system capable of high-speed data collection from up to four sensor arrays. Additionally, we demonstrate two custom set-ups to test and validate the textile-based sensors in a simulated prosthetic environment. Finally, we utilize the textile-based sensors to study the ISE of a bilateral transtibial amputee. Results indicate that the textile-based sensors provide a promising potential for seamlessly monitoring the ISE.}, number={7}, journal={IEEE SENSORS JOURNAL}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Tabor, Jordan and Agcayazi, Talha and Fleming, Aaron and Thompson, Brendan and Kapoor, Ashish and Liu, Ming and Lee, Michael Y. and Huang, He and Bozkurt, Alper and Ghosh, Tushar K.}, year={2021}, month={Apr}, pages={9413–9422} }
 @inproceedings{kapoor_mcknight_chatterjee_agcayazi_kausche_ghosh_bozkurt_2016, place={Orlando, FL, USA}, title={Soft, flexible 3D printed fibers for capacitive tactile sensing}, url={http://ieeexplore.ieee.org/document/7808918/}, DOI={10.1109/icsens.2016.7808918}, abstractNote={This study presents our latest efforts towards developing a force sensor array by weaving 3D printed functionalized polymer fibers. Silicone was used as the base polymer and carbon fillers were used to impart electrical conductivity. Two “H”-shaped fiber cross-sections oriented orthogonally acted as a parallel plate capacitor and were used for detecting normal forces. In this article, we present the fabrication method of the unique “H”-shaped fiber cross-section along with the investigation of the relation between applied force and measured capacitance. We also report the sensor response to variation in temperature. The sensing crossover was found to have a stable mechanical and electrical response in the force range of 0–6 N and the performance of this soft sensor was not significantly affected by temperature.}, booktitle={2016 ieee sensors}, author={Kapoor, A. and McKnight, M. and Chatterjee, K. and Agcayazi, T. and Kausche, H. and ghosh and Bozkurt, A.}, year={2016}, pages={1–3} }