Design and Product Development

Strain-sensing Auxetic Knit with Embedded Elastomeric Optical Fibers

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Abstract

This study shows the development of a strain-sensing auxetic knit textile with embedded elastomeric optical fiber for the advanced sensing applications. Auxetic structures can improve mechanical adaptability, comfort and durability of fabrics due to their behavior of negative Poisson's ratio. This means that the fabric can expand laterally when stretched longitudinally. To achieve auxetic behavior, a log-cabin style knit was designed and fabricated using alternating knit and purl stitches. The elastomeric fiber was embedded within a rib structure to enable strain sensing while retaining fabric extensibility. The auxetic structure was validated through mechanical assessments and it was observed that, under strain, the fiber-integrated knit showed a smooth, linear shift in sensor output. Demonstrating an efficient link between optical signal response and textile deformation. Wearable health monitoring, motion tracking, soft robotics, and adaptive smart clothing that need multidirectional stretch and responsive sensing are the applications for this integrated auxetic-sensing knit structure. 

Keywords: Auxetic Knit, Optical Fiber, Strain Sensing

How to Cite:

Balegar Mohan, R. & Jo, J., (2025) “Strain-sensing Auxetic Knit with Embedded Elastomeric Optical Fibers”, International Textile and Apparel Association Annual Conference Proceedings 82(1). doi: https://doi.org/10.31274/itaa.21968