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Lightweight Optimization of Infant Pop-up Seat Frame Using DMTO in Static Condition

DMTO 기법을 활용한 정적 하중환경의 유아용 팝업시트 프레임의 경량화

  • Hong, Seung Pyo (Graduate School of Future Convergence Engineering, Kongju National University) ;
  • Cha, Seung Min (Alga Co.Ltd) ;
  • Shin, Dong Seok (Graduate School of Mechanical Engineering, Kongju National University) ;
  • Jeon, Euy Sik (Graduate School of Future Convergence Engineering, Kongju National University)
  • Received : 2021.09.30
  • Accepted : 2021.11.14
  • Published : 2022.01.31

Abstract

This paper proposes a solution to the problems of manufacturing cost and processability by applying discrete material and thickness optimization (DMTO) and minimizing the use of high-strength, lightweight materials in the optimization process. A simple infant pop-up seat model was selected as the application target, and the weight reduction effect and variation in strength according to the optimization results were observed. In this study, a simplified finite element model of an infant pop-up seat frame was first constructed. The model was used to perform a static structural analysis to verify the weight and strength of each part. The D-optimal design of the experimental method was then used to observe the influence of each part on the weight and strength. This process was applied using discrete thickness optimization (DTO) (which applies high-strength, lightweight materials and optimizes only the thickness) and DMTO (which considers both the material and thickness). The DTO and DMTO results were compared to verify the design method that determines the major parts and simultaneously considers the material and thickness. Accordingly, in this study, an optimal lightweight design that satisfied the strength standards of the seat frame was derived. Furthermore, discretization parameters were used to minimize the application of high-strength, lightweight materials.

Keywords

Acknowledgement

This paper was supported by the Human Resource Training Program(S2755803) for business-related research and development and Technology development Program(S2902829) of Ministry of SMEs and Startups, (MSS, Korea)

References

  1. Qin, H., Guo, Y., Liu, Z., Liu, Y., & Zhong, H., "Shape optimization of automotive body frame using an improved genetic algorithm optimizer, Advances in Engineering Software", Vol. 121, pp. 235-249, 2018. https://doi.org/10.1016/j.advengsoft.2018.03.015
  2. Mundo, D., Hadjit, R., Donders, S., Brughmans, M., Mas, P. and Desmet, W. "Simplified modelling of joints and beam-like structures for BIW optimization in a concept phase of the vehicle design process", Finite Elements in Analysis and Design, Vol. 45, No. 6, pp. 456-462, 2009. https://doi.org/10.1016/j.finel.2008.12.003
  3. Chi, Wu., Yunkai, Gao., Jianguang, Fang., Erik, Lund., Qing, Li., "Discrete topology optimization of ply orientation for a carbon fiber reinforced plastic (CFRP) laminate vehicle door", Materials & Design, Vol. 128, pp. 9-19, 2017. https://doi.org/10.1016/j.matdes.2017.04.089
  4. Denghong, Xiao., Hai, Zhang., Xiandong, Liu., Tian, He., Yingchun, Shan., "Novel steel wheel design based on multi-objective topology optimization", Journal of Mechanical Science and Technology, Vol. 28, pp. 1007-1016, 2014. https://doi.org/10.1007/s12206-013-1174-8
  5. Pablo, Jaen-Sola., Alasdair, S. McDonald., Erkan Oterkus, "Lightweight design of direct-drive wind turbine electrical generators: A Comparison between steel and composite material structures", Ocean Engineering, Vol. 181, pp. 330-341, 2019. https://doi.org/10.1016/j.oceaneng.2019.03.053
  6. Kim, H. S., Lee, Y. S., Yang, S. M., Kang, H. Y., "Structural Analysis on Variable Characteristics of Automotive Seat Frame by FEA", International Journal of Precision Engineering and Manufacturing-Green Technology, Vol. 3, pp. 75-79, 2016. https://doi.org/10.1007/s40684-016-0010-x
  7. Sjolund, J. H., Peeters, D., Lund, E., "Discrete Material and Thickness Optimization of sandwich structures", Composite Structures, Vol. 217, pp. 75-88, 2019. https://doi.org/10.1016/j.compstruct.2019.03.003
  8. Soren, N. Sorensen., Rene, Sorensen., Erik, Lund., "DMTO - a method for Discrete Material and Thickness Optimization of laminated composite structures", Structural and Multidisciplinary Optimization, Vol. 50, pp. 25-47, 2014. https://doi.org/10.1007/s00158-014-1047-5
  9. Christian, Frier. Hvejsel., Erik, Lund., Mathias, Stolpe., "Optimization strategies for discrete multi-material stiffness optimization", Structural and Multidisciplinary Optimization, Vol. 44, pp. 149-163, 2011. https://doi.org/10.1007/s00158-011-0648-5
  10. Jang, G. W., Choi, Y. M., Choi, G. J., "Discrete thickness optimization of an automobile body by using the continuous-variable-based method", Journal of Mechanical Science and Technology, Vol. 22, pp. 41-49, 2008. https://doi.org/10.1007/s12206-007-1005-x
  11. Hatami, M., Cuijpers, M. C. M., Boot, M. .D., "Experimental optimization of the vanes geometry for a variable geometry turbocharger (VGT) using a Design of Experiment (DoE) approach", Energy Conversion and Management, Vol. 106, pp. 1057-1070, 2015. https://doi.org/10.1016/j.enconman.2015.10.040
  12. Rajmohan, T., Palanikumar, K., "Modeling and analysis of performances in drilling hybrid metal matrix composites using D-optimal design", The International Journal of Advanced Manufacturing Technology, Vol. 64, pp. 1249-1261, 2013. https://doi.org/10.1007/s00170-012-4083-6
  13. ASTM E8/E8M-16a, "Standard Test Methods for Tension Testing of Metallic Materials", August 1, 2016.
  14. King, J. Foster., James, O, Kortge., Michael, J. Wolanin., "Hybrid III-A Biomechanically-Based Crash Test Dummy", SAE Transactions, Vol. 86, Section 4: 770720-771010, pp. 3268-3283, 1977.
  15. Jang, H. S., Choi, S. K., Park, S. C., Lim, H. P., Oh, E. D., "A Study on the Development of Lightweight Seat Cushion Extension Module", Journal of the Korea Academia-Industrial cooperation Society, Vol. 17, No. 8, pp. 200-207, 2016. https://doi.org/10.5762/KAIS.2016.17.8.200