Abstract
This paper deals with the concurrent multi-scale optimization design of frame structure composed of glass or carbon fiber reinforced polymer laminates. In the composite frame structure, the fiber winding angle at the micro-material scale and the geometrical parameter of components of the frame in the macro-structural scale are introduced as the independent variables on the two geometrical scales. Considering manufacturing requirements, discrete fiber winding angles are specified for the micro design variable. The improved Heaviside penalization discrete material optimization interpolation scheme has been applied to achieve the discrete optimization design of the fiber winding angle. An optimization model based on the minimum structural compliance and the specified fiber material volume constraint has been established. The sensitivity information about the two geometrical scales design variables are also deduced considering the characteristics of discrete fiber winding angles. The optimization results of the fiber winding angle or the macro structural topology on the two single geometrical scales, together with the concurrent two-scale optimization, is separately studied and compared in the paper. Numerical examples in the paper show that the concurrent multi-scale optimization can further explore the coupling effect between the macro-structure and micro-material of the composite to achieve an ultra-light design of the composite frame structure. The novel two geometrical scales optimization model provides a new opportunity for the design of composite structure in aerospace and other industries.
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Acknowledgments
The financial support for this research was provided by the Program (Grants 11372060, 91216201) of the National Natural Science Foundation of China, Program (LJQ2015026 ) for Excellent Talents at Colleges and Universities in Liaoning Province, the Major National Science and Technology Project (2011ZX02403-002), 111 project (B14013), Fundamental Research Funds for the Central Universities (DUT14LK30), and the China Scholarship Fund.
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Yan, J., Duan, Z., Lund, E. et al. Concurrent multi-scale design optimization of composite frame structures using the Heaviside penalization of discrete material model. Acta Mech. Sin. 32, 430–441 (2016). https://doi.org/10.1007/s10409-015-0485-7
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DOI: https://doi.org/10.1007/s10409-015-0485-7