Functionally Graded Knitted Actuators with NiTi-Based Shape Memory Alloys for Topographically Self-Fitting Wearables
Functionally Graded Knitted Actuators with NiTi-Based Shape Memory Alloys for Topographically Self-Fitting Wearables
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DOI：
10.1002/admt.201900548
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发表时间：
2019-11-01
影响因子：
6.8
通讯作者：
Abel, Julianna
中科院分区：
文献类型：
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作者：
Granberry, Rachael;Eschen, Kevin;Abel, Julianna
致动织物的进步可以通过动态地使自身适应人体的独特地形来实现智能可穿戴设备领域的范式转变。包括软可穿戴机器人、连续健康监测和身体安装式触觉反馈系统在内的应用都依赖于同时的身体接近度和服装刚度来实现功能。被动织物和贴合机构不能围绕表面凹部适形，并且需要高弹性或多个闭合装置来实现服装贴合。介绍了由NiTi基形状记忆合金（SMA）针织致动器组成的第一种周向收缩和地形自贴合服装的设计、制造和验证，所述致动器响应于服装温度的变化而动态地符合穿戴者身体的独特形状和尺寸。先进的材料和系统创新1）实现了新颖的服装制造和应用策略，2）通过服装结构设计促进了地形拟合（空间致动），以及3）提供了可调的NiTi基SMA致动温度，以实现在人体皮肤表面上的致动。这项研究代表了可穿戴应用的范式转变，通过先进的材料和结构设计，重新定义服装的适合性，以充分地形构象的穿着者。
Advances in actuating fabrics can enable a paradigm shift in the field of smart wearables by dynamically fitting themselves to the unique topography of the human body. Applications including soft wearable robotics, continuous health monitoring, and body-mounted haptic feedback systems are dependent upon simultaneous body proximity and garment stiffness for functionality. Passive fabrics and fitting mechanisms are unable to conform around surface concavities and require either high elasticity or a multiplicity of closure devices to achieve garment fit. The design, manufacture, and validation of the first circumferentially contractile and topographic self-fitting garments composed of NiTi-based shape memory alloy (SMA) knitted actuators that dynamically conform to the unique shape and size of the wearer's body in response to a change of the garment's temperature is introduced. Advanced materials and systems innovations 1) enable novel garment manufacturing and application strategies, 2) facilitate topographical fitting (spatial actuation) through garment architectural design, and 3) provide tunable NiTi-based SMA actuation temperatures to enable actuation on the surface of human skin. This research represents a paradigm shift for wearable applications by redefining garment fit to fully topographical conformation to the wearer through advanced materials and structures design.