Topology optimization of additive manufactured CFRP structures with anisotropy properties to minimize frequency response
Abstract
Purpose
This study aims to present a novel topology optimization method for effectively minimizing the frequency response over a given frequency interval considering anisotropic features and fiber angles simultaneously.
Design/methodology/approach
The variable thickness sheet (VTS) method is used to obtain a free material distribution under the specified volume constraint. The anisotropic equivalent stiffness matrix based on the material fiber angles is considered in the orthotropic material properties model, which ensures a sufficiently large design space to minimize the frequency response. To lessen the computational burden, the quasi-static Ritz vector (QSRV) method is integrated to approximate the structural response.
Findings
Compared to considering only one element, the optimization process simultaneously considers the spatially-varying fiber angles and the material distribution, allowing for a broader design space to minimize the frequency response of additive manufacturing (AM) structures. The orthotropic properties play an important role in determining optimal material distribution of the structure. Moreover, the QSRV method makes the frequency response analysis more efficient.
Originality/value
The anisotropic stiffness and spatially-varying angles of the fiber materials induced by the layer-by-layer printing process of carbon fiber reinforced plastics (CFRP) are simultaneously considered to further minimize the frequency response of AM structures, which improves the performance of AM-CFRP structures.
Keywords
Acknowledgements
This work was supported by the Research Grants Council (Project No. C4074–22G) of Hong Kong Special Administrative Region, China, National Science Foundation for Young Scientist of China (52102421), the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CUHK14211823), The Chinese University of Hong Kong (Project ID: 4055178), and Fundamental Research Funds for the Central Universities (3202002201C3).
Replication of results: The results presented in this paper can be replicated using software Matlab. The data and codes will be available once requested.
Data availability: Data will be made available on request.
Declaration of conflicting interests: The authors declare that they have no financial and personal relationships with other people or organizations that can inappropriately influence this work, there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be constructed as influencing the position presented in, or the review of, the manuscript entitled, “Topology optimization of additive manufactured CFRP structures with anisotropy properties to minimize frequency response”.
Citation
Wang, J., Zhang, Y., Wang, X., Zhu, N., Liao, W.-H. and Gao, Q. (2024), "Topology optimization of additive manufactured CFRP structures with anisotropy properties to minimize frequency response", Rapid Prototyping Journal, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/RPJ-06-2024-0253
Publisher
:Emerald Publishing Limited
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