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Structural and Multidisciplinary Optimization

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07-02-2021 | Research Paper

Design of metamaterial mechanisms using robust topology optimization and variable linking scheme

Authors: Kai Wu, Ole Sigmund, Jianbin Du

Published in: Structural and Multidisciplinary Optimization | Issue 4/2021

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Abstract

Metamaterial mechanisms are structures composed of periodic cells that possess special mechanism responses. This paper proposes a topology optimization method based on a variable linking scheme for the design of metamaterial mechanisms. A robust formulation is included to improve the manufacturing reliability of the designs and prevent de-facto hinges. The proposed method is applied to the designs of a force inverter and some other interesting mechanisms. Numerical examples illustrate that metamaterial structures with desired mechanism performances can be obtained by the presented method. Studies are performed to compare the responses and robustness between conventional compliant mechanisms and metamaterial mechanisms. Furthermore, multiple subdomains are adopted to introduce more flexibility in the design. The work highlights the pros and cons of metamaterial mechanisms compared to conventional compliant mechanisms.

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Title: Design of metamaterial mechanisms using robust topology optimization and variable linking scheme
Authors: Kai Wu
Ole Sigmund
Jianbin Du
Publication date: 07-02-2021
Publisher: Springer Berlin Heidelberg
Published in: Structural and Multidisciplinary Optimization / Issue 4/2021
Print ISSN: 1615-147X
Electronic ISSN: 1615-1488
DOI: https://doi.org/10.1007/s00158-020-02791-1

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Identification of marginal and joint CDFs using bivariate type I interval multiply censored data for RBDO of a pick-up device of a pilot mining robot

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