Two-Scale Topology Optimization of the 3D Plant-Inspired Adaptive Cellular Structures for Morphing Applications
Publication: Journal of Aerospace Engineering
Volume 33, Issue 4
Abstract
A novel two-scale topology optimization method is developed in this work to optimize three-dimensional (3D) plant-inspired fluidic adaptive cellular structures for morphing applications. In this method, the coupled mechanical behaviors of the 3D smart structures with fluidic cells are simulated by extended multiscale finite-element method. Multiscale base functions are constructed through the microscale computation to create the relationship between information of the single cells in the microscale and structural deformation in the macroscale. Furthermore, the 3D structural topology algorithm based on the power-low interpolation approach is combined with the multiscale method to improve the mechanical behaviors of the plant-inspired cellular structures. Consequently, the plant-inspired cellular structures can be designed by the proposed optimization method, in which the distribution of the motor cells is optimized to maximize the structural performance. Then, the smart structures based on fluid actuation of the cells can be optimized to create biomimetic compliant mechanisms, where self-actuated output displacements are set as the design objective. Moreover, the proposed two-scale optimization algorithm is investigated to optimize the number of liquid motor cells in order to minimize the weight of the cellular structure. Numerical examples including the design problems of morphing wings indicated that the two-scale topology optimization method can be effectively used to design the 3D plant-inspired cellular structures.
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Data Availability Statement
All data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
The supports of this investigation by the National Natural Science Foundation of China (11772083, 11672062), the Fundamental Research Funds for the Central Universities (DUT17LK26), Dalian High Level Talent Innovation Support Program (2015R046), and Aeronautical Science Foundation of China (2017ZA63003) are gratefully acknowledged.
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Published In
Journal of Aerospace Engineering
Volume 33 • Issue 4 • July 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Apr 4, 2019
Accepted: Oct 16, 2019
Published online: Apr 21, 2020
Published in print: Jul 1, 2020
Discussion open until: Sep 21, 2020
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