In Situ Imaging of Parachute Textile Micro-Mechanics Under Tensile Load
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2024
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| author | Phillippe, Cutler Panerai, Francesco Villafane, Laura |
| author_facet | Phillippe, Cutler Panerai, Francesco Villafane, Laura |
| contents | Micro-mechanics of parachute fabrics under tensile loads is studied using in situ X-ray micro-tomography. Results are presented for two nylon textiles commonly used in parachute systems, MIL-C-7020H Type III and MIL-C-44378(GL) Type II. Textiles are subjected to incremental tension using a custom apparatus that loads the fabric radially, and the microstructure is imaged sequentially at steady load conditions. Micro-tomography images are processed using learning-aided segmentation and a custom processing pipeline that tracks the locations and morphological properties of individual tows on 3-D datasets. Results are used to reconstruct tow micro-scale properties and meso-scale strains. Our findings reveal a direct relation between the fabric architecture and the meso-scale mechanics. Warp tow pretensioning during manufacturing is found to affect decrimping and the anisotropy of the textile strains. Areal porosity increase with tension is quantified and a geometric model for pore opening under incremental load is validated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_08072 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | In Situ Imaging of Parachute Textile Micro-Mechanics Under Tensile Load Phillippe, Cutler Panerai, Francesco Villafane, Laura Materials Science Micro-mechanics of parachute fabrics under tensile loads is studied using in situ X-ray micro-tomography. Results are presented for two nylon textiles commonly used in parachute systems, MIL-C-7020H Type III and MIL-C-44378(GL) Type II. Textiles are subjected to incremental tension using a custom apparatus that loads the fabric radially, and the microstructure is imaged sequentially at steady load conditions. Micro-tomography images are processed using learning-aided segmentation and a custom processing pipeline that tracks the locations and morphological properties of individual tows on 3-D datasets. Results are used to reconstruct tow micro-scale properties and meso-scale strains. Our findings reveal a direct relation between the fabric architecture and the meso-scale mechanics. Warp tow pretensioning during manufacturing is found to affect decrimping and the anisotropy of the textile strains. Areal porosity increase with tension is quantified and a geometric model for pore opening under incremental load is validated. |
| title | In Situ Imaging of Parachute Textile Micro-Mechanics Under Tensile Load |
| topic | Materials Science |
| url | https://arxiv.org/abs/2407.08072 |