Designing modular 3D printed reinforcement of wound composite hollow beams with semidefinite programming
| Autor: | R. Poul, Jan Novák, Matěj Lepš, Jan Zeman, Tomáš Plachý, Marek Tyburec |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
business.product_category
Materials science Composite number FOS: Physical sciences Mechanical engineering 3D printing Applied Physics (physics.app-ph) 02 engineering and technology 010402 general chemistry 01 natural sciences lcsh:TA401-492 General Materials Science Semidefinite programming business.industry Mechanical Engineering Physics - Applied Physics Modular design 021001 nanoscience & nanotechnology 0104 chemical sciences Design for manufacturability Machine tool Shear (sheet metal) Buckling Mechanics of Materials lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology business |
| Zdroj: | Materials & Design, Vol 183, Iss, Pp-(2019) |
| Popis: | Fueled by their excellent stiffness-to-weight ratio and the availability of mature manufacturing technologies, filament wound carbon fiber reinforced polymers represent ideal materials for thin-walled laminate structures. However, their strong anisotropy reduces structural resistance to wall instabilities under shear and buckling. Increasing laminate thickness degrades weight and structural efficiencies and the application of a dense internal core is often uneconomical and labor-intensive. In this contribution, we introduce a convex linear semidefinite programming formulation for truss topology optimization to design an efficient non-uniform lattice-like internal structure. The internal structure not only reduces the effect of wall instabilities, mirrored in the increase of the fundamental free-vibration eigenfrequency, but also keeps weight low, secures manufacturability using conventional three-dimensional printers, and withstands the loads induced during the production process. We showcase a fully-automatic procedure in detail for the design, prototype manufacturing, and verification of a simply-supported composite machine tool component, including validation with roving hammer tests. The results confirm that the 3D-printed optimized internal structure almost doubles the fundamental free-vibration eigenfrequency, allowing to increase working frequency of the machine tool, even though the ratio between elastic properties of the carbon composite and the ABS polymer used for 3D printing exceeds two orders of magnitude. 13 pages, 13 figures |
| Databáze: | OpenAIRE |
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