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| Analysis of Bearing Capacity of PLA Honeycomb Reinforced Structure with Prefabricated Defects |
| Received:July 11, 2023 Revised:December 07, 2023 |
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| DOI：10.7643/issn.1672-9242.2024.01.004 |
| KeyWord:polylactic acid porous honeycomb structure reinforced plates prefabrication defects bearing capacity |
| Author | Institution |
| XIN Yuke |
School of Science, Chang'an University, Xi'an , China |
| DENG Qingtian |
School of Science, Chang'an University, Xi'an , China |
| SONG Xueli |
School of Science, Chang'an University, Xi'an , China |
| LI Xinbo |
School of Science, Chang'an University, Xi'an , China |
| WEN Jinpeng |
Institute of Systems Engineering, China Academy of Engineering Physics, Sichuan Mianyang , China |
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| Abstract: |
| The work aims to analyze the effect of different reinforcement configurations and prefabricated defect forms on the flexural bearing capacity of honeycomb reinforced structures. With thermoplastic PLA as the base material, the honeycomb stiffened structure specimens with prefabricated defects were prepared by additive manufacturing technology. Considering the length, quantity, depth and direction of the defects, the three-point bending test method and the finite element simulation results were used for comprehensive analysis. The displacement-load relationship and failure of the structure were obtained. The experiment and simulation fitted well in the linear elastic deformation stage. In this stage, the bearing capacity of the hexagonal configuration PLA honeycomb reinforced curved plate structure was better than that of the regular hexagonal structure, but the latter had better residual bearing capacity in the post-buckling stage and was less prone to fracture. Compared with the defect length, the defect depth and the number of defective rib walls had a more significant effect on the bearing capacity of the structure. The closer the defect direction was to the width direction, the lower the bearing capacity of the structure was. In practical engineering, the defect of transverse reinforced rib wall at the middle bearing position of the structure should be avoided as much as possible, and the respective bearing advantages of regular hexagon and inner hexagon honeycomb reinforced structures should be fully utilized. |
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