1. Influence of structural geometry on tensile properties and fracture toughness in 3D printed novel structures.
- Author
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Lin, Shiyun, Peng, Chenyun, Deng, Fanghang, Yin, Dagang, and Ye, Bei
- Subjects
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FRACTURE toughness , *POISSON'S ratio , *SANDWICH construction (Materials) , *CARBON-based materials , *HONEYCOMB structures , *FIBROUS composites - Abstract
• Three kinds of honeycomb structures were printed using carbon fiber reinforced composites, and the tensile mechanical properties of honeycomb structures were studied by combining experimental and simulation analysis methods. Finally, the relationship between fracture toughness and fractal dimension of tensile fracture surface is analyzed by fractal theory. The study employed chopped fiber-reinforced nylon composite, referred to as "Onyx," along with continuous carbon fiber materials. Using the material extrusion manufacturing process, three sandwich structures were created: a conventional, a concave hexagonal with negative Poisson's ratio, and a feather-inspired structure. Tensile testing and finite element simulations were conducted to analyze their tensile properties and crack propagation paths under tension. Fractal dimensions were calculated for each structure: the standard structure had a dimension of 1.4626, the bionic feather-inspired was 1.4810, and the negative Poisson's ratio concave hexagonal structure measured 1.4973. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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