Abstract
Lightweight and durable flexible materials with good mechanical properties, reliability, and excellent environmental compatibility have been increasingly widely applied in the field of wearable devices, microelectronics, and soft robots. An orthogonal experimental method was applied to fabricate thermoplastic polyurethane elastomer rubber (TPU) using fused deposition melting technology. The influence of three processing parameters on the mechanical property of the samples was investigated. The optimized printing parameters are 230 °C for the nozzle temperature, 0.1 mm for the thickness of the printing layer, and 100% for the filling percentage. The relationship between the fracture surface and the filling angle of the specimen under tensile stress was analyzed. To realize the lightweight of planar structural materials by melt deposition molding, nine types of planar porous structures were designed based on different average connectivity. The tensile stress simulation was carried out to obtain further the distribution of stress and the location of stress concentration. The relationship between relative density, fracture strength, and elongation at break was analyzed by static tensile test. The fracture morphology of the sample was observed and compared with the simulation results, which indicated that the hexagonal planar porous structure achieved the best balance between structural lightweight and mechanical properties.
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The datasets generated and analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgments
This research is financially funded by the General Program from the Educational Commission of Liaoning Province of China (Grant No. LJKZ0500). We thank our research classmates for their valuable work and for providing experiment data, and the anonymous reviewers for their critiques and comments.
Funding
The research described here was supported by the General Program from the Educational Commission of Liaoning Province of China (Grant No. LJKZ0500).
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DH and YZ conceived the presented idea. HZ and XW wrote the manuscript. XW and LF carried out the experiments. LF and LY performed the finite element analysis. YZ revised the manuscript. All authors have discussed and agreed to the published version of the manuscript.
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Zhang, H., Wang, X., Yang, L. et al. Structural Lightweight Design of Thermoplastic Polyurethane Elasticity Fabricated by Fused Deposition Modeling. J. of Materi Eng and Perform (2023). https://doi.org/10.1007/s11665-023-08797-2
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DOI: https://doi.org/10.1007/s11665-023-08797-2