Printed Paper Actuator

Wang, Guanyun; Cheng, Tingyu; Do, Youngwook; Yang, Humphrey; Tao, Ye; Gu, Jianzhe; An, Bo; Yao, Lining

doi:10.1145/3173574.3174143

Cited by 91 publications

(23 citation statements)

References 41 publications

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“…This level of actuation is very intriguing, compared to that of other thermo‐hygroscopic actuators. [ 29 ] The notable improvement of the actuation performance originates from the superior hydrophilic capability of VONWs to interact with water molecules. As discussed earlier, the VONWs are capable of absorbing and desorbing more moisture, boosting the hygroscopic volumetric expansion and contraction.…”

Section: Actuation Performance Of Photo‐active and Electro‐active Vonw Actuatorsmentioning

confidence: 99%

Electro‐Active and Photo‐Active Vanadium Oxide Nanowire Thermo‐Hygroscopic Actuators for Kirigami Pop‐up

et al. 2021

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Emerging technologies such as soft robotics, active biomedical devices, wearable electronics, haptic feedback systems, and healthcare systems require high-fidelity soft actuators showing reliable responses under multi-stimuli. In this study, the authors report an electro-active and photo-active soft actuator based on a vanadium oxide nanowire (VONW) hybrid film with greatly improved actuation performances. The VONWs directly grown on a cellulose fiber network increase the surface area up to 30-fold and boost the hydrophilicity owing to the presence of oxygen-rich functional groups in the nanowire surfaces. Taking advantage of the high surface area and hydrophilicity of VONWs, a soft thermo-hygroscopic VONW actuator capable of being controlled by both light and electric sources shows greatly enhanced actuation deformation by almost 70% and increased actuation speed over 3 times during natural convection cooling. Most importantly, the proposed VONW actuator exhibits a remarkably improved blocking force of up to 200% compared with a bare paper actuator under light stimulation, allowing them to realize a complex kirigami pop-up and to accomplish repeatable shape transformation from a 2D planar surface to a 3D configuration.

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Section: Actuation Performance Of Photo‐active and Electro‐active Vonw Actuatorsmentioning

confidence: 99%

Electro‐Active and Photo‐Active Vanadium Oxide Nanowire Thermo‐Hygroscopic Actuators for Kirigami Pop‐up

et al. 2021

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“…Any thermal stress is attributed to the difference in thermal expansion coefficients between the continuous fiber composite material and the thermoplastic resin. Later, an additional heat cycle is applied to release the residual stress inside the printed structure (Wang et al, 2018b). When heating, the residual stress is released to offset any deformation causing by thermal expansion mismatch.…”

Section: Materials and Principle For Four-dimensional Printingmentioning

confidence: 99%

Four-Dimensional Printing of Alternate-Actuated Composite Structures for Reversible Deformation under Continuous Reciprocation Loading

et al. 2021

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Four-dimensional (4D) printed structures are usually designed with reduced stiffness to enlarge the deformation response and weaken the loading capacity in actuated states. These actuators are suitable for non-persistent loads, such as is involved in grabbing action by a 4D printed claw. However, reduced stiffness cannot support continuous external loads during actuation. To tackle the trade-off between deformation and loading capacity, we propose herein a design using alternate actuation to attain competent loading capacity in different deformed states. In this alternate design, each unit consists of two actuated components featuring the same deformation but reciprocal stiffness, which provides the overall structural stiffness required to attain competent loading capacity during the entire deformation process. The two components are programmed to have the deformation behavior and are stimulated by thermal-expansion mismatch between polylactic acid (PLA) and carbon-fiber-reinforced PLA. An actuator featuring alternate components was designed and 4D printed to contrast its loading capacity with that of the traditional design. Experiments demonstrate a significantly improved loading capacity during actuation. This work thus provides a designing strategy for 4D printed actuators to retain competent loading capacity during the entire deformation process, which may open promising routes for applications with continuous external loads, such as 4D printed robotic arms, walking robots, and deformable wheels.

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“…While the prediction results can visualize the transformation trend, they are not sufficiently accurate to support design tasks that require high precision like modularization. In relatively small scales, Thermorph [1], Printed Paper Actuator [39], A-line [40], and bioLogic [46] combined parametric geometries with forward kinematics to simulate tree-topological patterns, but this approach is incompatible with more complex or larger patterns like 4DMesh [41] due to their omission of physical forces. To tackle more complex patterns, [32] and Geodesy [12,32] used linear mass-spring models to approximate the materials' transformation.…”

Section: Simulation In Morphing Materialsmentioning

confidence: 99%

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et al. 2020

Proceedings of the 33rd Annual ACM Symposium on User Interface Software and Technology

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Morphing materials allow us to create new modalities of interaction and fabrication by leveraging the materials' dynamic behaviors. Yet, despite the ongoing rapid growth of computational tools within this realm, current developments are bottlenecked by the lack of an effective simulation method. As a result, existing design tools must trade-off between speed and accuracy to support a real-time interactive design scenario. In response, we introduce SimuLearn, a data-driven method that combines finite element analysis and machine learning to create real-time (0.61 seconds) and truthful (97% accuracy) morphing material simulators. We use mesh-like 4D printed structures to contextualize this method and prototype design tools to exemplify the design workflows and spaces enabled by a fast and accurate simulation method. Situating this work among existing literature, we believe SimuLearn is a timely addition to the HCI CAD toolbox that can enable the proliferation of morphing materials.

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Printed Paper Actuator

Cited by 91 publications

References 41 publications

Electro‐Active and Photo‐Active Vanadium Oxide Nanowire Thermo‐Hygroscopic Actuators for Kirigami Pop‐up

Electro‐Active and Photo‐Active Vanadium Oxide Nanowire Thermo‐Hygroscopic Actuators for Kirigami Pop‐up

Four-Dimensional Printing of Alternate-Actuated Composite Structures for Reversible Deformation under Continuous Reciprocation Loading

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