Toolpath Generation for High Density Spatial Fiber Printing Guided by Principal Stresses
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910791520747520 |
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| author | Zhang, Tianyu Liu, Tao Dutta, Neelotpal Chen, Yongxue Su, Renbo Zhang, Zhizhou Wang, Weiming Wang, Charlie C. L. |
| author_facet | Zhang, Tianyu Liu, Tao Dutta, Neelotpal Chen, Yongxue Su, Renbo Zhang, Zhizhou Wang, Weiming Wang, Charlie C. L. |
| contents | While multi-axis 3D printing can align continuous fibers along principal stresses in continuous fiber-reinforced thermoplastic (CFRTP) composites to enhance mechanical strength, existing methods have difficulty generating toolpaths with high fiber coverage. This is mainly due to the orientation consistency constraints imposed by vector-field-based methods and the turbulent stress fields around stress concentration regions. This paper addresses these challenges by introducing a 2-RoSy representation for computing the direction field, which is then converted into a periodic scalar field to generate partial iso-curves for fiber toolpaths with nearly equal hatching distance. To improve fiber coverage in stress-concentrated regions, such as around holes, we extend the quaternion-based method for curved slicing by incorporating winding compatibility considerations. Our proposed method can achieve toolpaths coverage between 87.5% and 90.6% by continuous fibers with 1.1mm width. Models fabricated using our toolpaths show up to 84.6% improvement in failure load and 54.4% increase in stiffness when compared to the results obtained from multi-axis 3D printing with sparser fibers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_16851 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Toolpath Generation for High Density Spatial Fiber Printing Guided by Principal Stresses Zhang, Tianyu Liu, Tao Dutta, Neelotpal Chen, Yongxue Su, Renbo Zhang, Zhizhou Wang, Weiming Wang, Charlie C. L. Graphics Computational Geometry While multi-axis 3D printing can align continuous fibers along principal stresses in continuous fiber-reinforced thermoplastic (CFRTP) composites to enhance mechanical strength, existing methods have difficulty generating toolpaths with high fiber coverage. This is mainly due to the orientation consistency constraints imposed by vector-field-based methods and the turbulent stress fields around stress concentration regions. This paper addresses these challenges by introducing a 2-RoSy representation for computing the direction field, which is then converted into a periodic scalar field to generate partial iso-curves for fiber toolpaths with nearly equal hatching distance. To improve fiber coverage in stress-concentrated regions, such as around holes, we extend the quaternion-based method for curved slicing by incorporating winding compatibility considerations. Our proposed method can achieve toolpaths coverage between 87.5% and 90.6% by continuous fibers with 1.1mm width. Models fabricated using our toolpaths show up to 84.6% improvement in failure load and 54.4% increase in stiffness when compared to the results obtained from multi-axis 3D printing with sparser fibers. |
| title | Toolpath Generation for High Density Spatial Fiber Printing Guided by Principal Stresses |
| topic | Graphics Computational Geometry |
| url | https://arxiv.org/abs/2410.16851 |