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P. Fang, T. Gao, W. Zhang, "Simultaneous Optimization of Ply Angles and Thickness for Double-Double Laminates", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Sixteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 14, Paper 12.1, 2026, doi:10.4203/ccc.14.12.1

Keywords: composite materials, double-double laminates, progressive ply interpolation model, ply-drop, angle and thickness optimisation design, stiffness optimisation design.

Abstract

Double-Double (DD) laminates facilitate high-performance and lightweight designs through ply angle optimisation and gradual thickness tapering. This work proposes a simultaneous optimisation method for ply angles and thickness of Double-Double (DD) laminates. The Progressive Ply Interpolation[1] (PPI) model is improved through two key modifications. First, the weight expression is streamlined by simplifying the product terms of design variables from underlying sub-plies. This modification reduces the computational cost for both interpolation and sensitivity analysis. Second, angle optimisation is integrated into the interpolation scheme to facilitate simultaneous design of angles and thickness. Additionally, two penalty strategies are developed to enforce discrete ply angles. Numerical results confirm the ability to obtain discrete angles, thereby achieving the concurrent optimisation design of discrete angles and thickness for DD laminates.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 14 PROCEEDINGS OF THE SIXTEENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: P. Iványi, J. Kruis and B.H.V. Topping Paper 12.1 Simultaneous Optimization of Ply Angles and Thickness for Double-Double Laminates P. Fang, T. Gao and W. Zhang State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xi’an, China doi:10.4203/ccc.14.12.1 Full Bibliographic Reference for this paper P. Fang, T. Gao, W. Zhang, "Simultaneous Optimization of Ply Angles and Thickness for Double-Double Laminates", in P. Iványi, J. Kruis, B.H.V. Topping, (Editors), "Proceedings of the Sixteenth International Conference on Computational Structures Technology", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 14, Paper 12.1, 2026, doi:10.4203/ccc.14.12.1 Keywords: composite materials, double-double laminates, progressive ply interpolation model, ply-drop, angle and thickness optimisation design, stiffness optimisation design. Abstract Double-Double (DD) laminates facilitate high-performance and lightweight designs through ply angle optimisation and gradual thickness tapering. This work proposes a simultaneous optimisation method for ply angles and thickness of Double-Double (DD) laminates. The Progressive Ply Interpolation[1] (PPI) model is improved through two key modifications. First, the weight expression is streamlined by simplifying the product terms of design variables from underlying sub-plies. This modification reduces the computational cost for both interpolation and sensitivity analysis. Second, angle optimisation is integrated into the interpolation scheme to facilitate simultaneous design of angles and thickness. Additionally, two penalty strategies are developed to enforce discrete ply angles. Numerical results confirm the ability to obtain discrete angles, thereby achieving the concurrent optimisation design of discrete angles and thickness for DD laminates. download the full-text of this paper (PDF, 10 pages, 612 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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