期刊
MATERIALS TODAY COMMUNICATIONS
卷 31, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtcomm.2022.103364
关键词
NURBS curve; Laminates; Variable angle; Trajectory planning; Optimization analysis
资金
- Universities Natural Science Research Major Project of Jiangsu Province [21KJA460004]
- National Natural Science Foundation of China [51705266]
This study focuses on the optimization design of variable stiffness laminates with a hole based on cubic NURBS curve. By utilizing variable angle fiber placement and radial basis function, an optimization model is established and the optimal results are obtained through comparative analysis.
Based on cubic NURBS curve, the optimization design of the variable stiffness laminates with a hole are carried out. Firstly, the reference trajectory of the fiber prepared by variable angle placement is defined by cubic NURBS curve, and the parameterized expression of variable-angle fiber placement is derived. Secondly, the linear buckling analyses of all constant stiffness laminates with a hole are carried out to obtain the constant stiffness laminates with the maximum first-order buckling load, the +/- 45 degrees placement of the constant stiffness laminates with a hole is replaced by the variable-angle fiber placements. The linear buckling analysis of the variable stiffness laminates with a hole is carried out. Then, the radial basis function is used to build an optimization model to optimize the variable stiffness laminates with a hole. Finally, under the constraints of curvature radius, MATLAB is used to conduct the optimization of variable stiffness laminates with a hole, and the optimal results under different curvature constraints are obtained. The results show that the buckling load coefficient of [+/-<10 (0.1)(0.6)(0.6)53 > ](2sH) laminates is 32.93% higher than that of [45/-45](2sH) laminates. Using cubic NURBS curve to design laminates with a hole can avoid stress concentration and improve the buckling property of laminates with a hole.
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