| Autor: |
Huan Zhao, Huddy, Julia E., Scheideler, William J., Yan Li |
| Předmět: |
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| Zdroj: |
Advanced Engineering Materials; 11/15/2023, Vol. 25 Issue 22, p1-10, 10p |
| Abstrakt: |
Metastructure-based pressure sensors (MBPS) offer higher sensitivity, broader sensing range, greater design flexibility, and superior performance tunability compared with traditional pressure sensors. Currently, there exists a gap between metastructure architecture design and prediction of sensing performance. To this end, a new design-to-manufacturing paradigm is presented. A coupled mechanical-electrical finite element model is developed to predict sensing performance of systematically designed MBPS. Rapid prototyping by additive manufacturing is achieved via micro-digital light processing and atomic layer deposition for forming nanoscale conductive coatings. Results indicate that a large sensing range requires high metastructure stiffness, achieved by increasing relative density. However, high sensitivity and reversible sensing both rely on elastic coating deformation--enforcing a balance between these properties. The trade-off between sensing range and sensitivity is investigated for structures with different Poisson's ratios and fillet ratios. Metastructure architecture design can lead to substantial expansion of the sensing range, enabling pressure detection ranging from 0 to 15 MPa (6.23%strain). An impressive sensitivity variance of 6.8 times has been observed between the highest and lowest MBPS samples. Finally, it is demonstrated how the design framework allows deep electromechanical integration of 3D-printed sensors with additively manufactured components, such as a truss bridge. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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