https://scholars.lib.ntu.edu.tw/handle/123456789/598619
標題: | Size effects of mechanical properties of nanohoneycomb with multiple surface orientations | 作者: | Tsai Y.-Y Chang S.-W. SHU-WEI CHANG |
關鍵字: | In-plane elasticity;Molecular dynamics simulations;Nanohoneycomb;Size effects;Surface effects;Biomechanics;Diagnosis;Drug delivery;Elastic moduli;Molecular dynamics;Nanostructures;Cell-wall thickness;Multiple surfaces;Property;Size and shape;Sizes effect;Surface effect;Surface orientation;Theoretical modeling;Honeycomb structures | 公開日期: | 2022 | 卷: | 165 | 來源出版物: | Mechanics of Materials | 摘要: | Nanostructures and nanomaterials have been studied thoroughly due to their remarkable properties. With various sizes and shapes, they serve as highly functional sensors in nanoelectromechanical systems (NEMS), noninvasive medical diagnostic devices or drug delivers. Although the importance of surfaces has been recognized when it comes to the nanoscale, few researchers investigate nanostructures with multiple surface orientations. In this work, we propose a two-surface theoretical model for nanohoneycombs and verify the model by conducting molecular dynamics (MD) simulations on regular hexagonal Al nanohoneycombs with cell-wall thickness ranging from 5 nm to 30 nm. These numerical examples show excellent agreement with the proposed theory, proving the applicability of the two-surface model. The Al nanohoneycomb exhibits significant “positive” size dependence – it is 2.4 times stiffer compared with its large counterpart when the cell-wall thickness is 5.7 nm. In sum, this study improves the accuracy of the predicted in-plane Young's moduli of nanohoneycombs by taking differently oriented surfaces into account and considering more comprehensive deformation mechanisms. By investigating nanosized honeycomb structure in-depth and providing a more general theoretical model, we aim to improve the accuracy of predicted mechanical properties and provide a guide for the applicability of various models for honeycombs. Furthermore, this study can help exploit the full potential of various nanoporous structures, not restricted to nanohoneycombs. ? 2021 Elsevier Ltd |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120399441&doi=10.1016%2fj.mechmat.2021.104178&partnerID=40&md5=136c87ec0c5a65b377280258a54cc83d https://scholars.lib.ntu.edu.tw/handle/123456789/598619 |
ISSN: | 01676636 | DOI: | 10.1016/j.mechmat.2021.104178 |
顯示於: | 土木工程學系 |
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