ArticleScience advances2026
Mechanics-informed fabric actuators with aligned fiber crossings.
Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
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Authors and funding
2 authors.
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Abstract
Engineering unobtrusive mechanical assistance into daily-life clothing requires energy-dense yet compliant actuators with thin profiles. We report textile actuators by interlacing shape memory alloy (SMA) fibers in a periodic X-Crossing geometry, where fiber crossings align in the actuation contraction axis. An X-Crossing actuator design of 4.5 grams can be passively stretched to 160% and contracts by 50% when heated, lifting 1 kg, outperforming knitted and knotted SMAs. We developed a variable-stiffness mechanics model to predict material-level stress-strain behavior across temperatures and thus the force-contraction relation of device level. This model informs actuator design and control, geometric scaling, peak points in the force-contraction relation, and the theoretical upper bound of contraction strain. The maximum measured contraction strain of our actuators is 55%, a large step toward the upper bound that we calculate for general SMA fabric actuators. We demonstrate applications of the developed actuators and model in lifting weight and on-body compression.
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Registered trials
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