Decision tree-based machine learning to optimize the laminate stacking of composite cylinders for maximum buckling load and minimum imperfection sensitivity
| Autor: | R. Khakimova, H.N.R. Wagner, Hardy Köke, Sascha Dähne, Steffen Niemann, Christian Hühne |
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| Rok vydání: | 2019 |
| Předmět: |
Composite cylinder
Materials science business.industry Composite number Decision tree Stacking 02 engineering and technology 021001 nanoscience & nanotechnology Machine learning computer.software_genre 020303 mechanical engineering & transports 0203 mechanical engineering Buckling Brute force Axial compression Ceramics and Composites Artificial intelligence 0210 nano-technology business Buckle computer Civil and Structural Engineering |
| Zdroj: | Composite Structures. 220:45-63 |
| ISSN: | 0263-8223 |
| DOI: | 10.1016/j.compstruct.2019.02.103 |
| Popis: | Launch-vehicle primary structures like cylindrical shells are increasingly being built as monolithic composite and sandwich composite shells. These imperfection sensitive shells are subjected to axial compression due to the weight of the upper structural elements and tend to buckle under axial compression. In the case of composite shells the buckling load and imperfection sensitivity depend on the laminate stacking sequence. Within this paper multi-objective optimizations for the laminate stacking sequence of composite cylinder under axial compression are performed. The optimization is based on different geometric imperfection types and a brute force approach for three different ply angles . Decision tree-based machine learning is applied to derive general design recommendations which lead to maximum buckling load and a minimum imperfection sensitivity. The design recommendation are based on the relative membrane, bending, in-plane shear and twisting stiffnesses. Several optimal laminate stacking sequences are generated and compared with similar laminate configurations from literature. The results show that the design recommendations of this article lead to high-performance cylinders which outperform comparable composite shells considerably. The results of this article may be the basis for future lightweight design of sandwich and monolithic composite cylinders of modern launch-vehicle primary structures. |
| Databáze: | OpenAIRE |
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