ANALYSIS OF SPOT-WELDING PITCH ON TOP HAT STRUCTURE AGAINST CRASHWORTHINESS CRITERIA

Authors

Abstract

The application of spot-welding in the automotive industry, especially the electric-based vehicle frame structure, has been optimized to meet passenger and battery compartment safety factors. The present numerical study of the electric-based vehicle frame structure with the top hat cross-sectional model validated the experimental results of reference, which then modified the spot-welding pitch to determine the crashworthiness effect and criteria. The numerical simulation results show that reducing spot-welding pitch in vertical direction can increase energy absorption (EA) by 1.70% - 9.91%, while bringing spot-welding pitch closer to the flange's outer edge can reduce its maximum force (Fmax) by 8.11% - 21.67%.

Keywords: Spot-welding; Top Hat Structure; Crashworthiness; Numerical Simulation; Electric Vehicle.

References

S. Arora, W. Shen, and A. Kapoor. "Review of mechanical design and strategic placement technique of a robust battery pack for electric vehicles", In: Renewable and Sustainable Energy Reviews, 2016, 60, pp. 1319-1331.

D. F. Silva, C. Silva, I.M. Bragança, C.V. Nielsen, L. M. Alves, & P.A. Martins. "On the performance of thin-walled crash boxes joined by forming", 2018, 11(7), pp. 1118.

S. Yang, L. Yan, and C. Qi. "An adaptive multi-step varying-domain topology optimization method for spot weld design of automotive structures", 2019, 59, pp. 291-310.

A. B. Ryberg, L. J. S. Nilsson, and M. optimization. "Spot weld reduction methods for automotive structures", 2016, 53(4), pp. 923-934.

L. Duan, Z. Du, H. Jiang, W. Xu, and Z Li. "Theoretical prediction and crashworthiness optimization of top-hat thin-walled structures under transverse loading", 2019, 144, pp. 106261.

G. Sun, J. Tian, T. Liu, X. Yan, and X. Huang. "Crashworthiness optimization of automotive parts with tailor rolled blank", 2018, 169, pp. 201-215.

G. Zheng, Z. Fan, H. Zhang, and P. Zhou. "Crashworthiness Optimization of Steel–Magnesium Hybrid Double-Hat-Shaped Tubes", 2018, 1(3), pp. 247-254.

A. Dimas, T. Dirgantara, and L. Gunawan. "The Effects of Spot Weld Pitch to the Axial Crushing Characteristics of Top-Hat Crash box", In: Applied Mechanics and Materials. 2014.

Q. Zhou, X. Wu, Y. Xia, and W. Cai. "Spot weld layout optimization of tube crash performance with manufacturing constraints", 2014, 136(1).

H. W. Song, Z. J. Fan, G. Yu, Q. C. Wang, and A. Tobota. "Partition energy absorption of axially crushed aluminum foam-filled hat sections", 2005, 42(9-10), pp. 2575-2600.

Y. Xiang, Q. Wang, Z. Fan, and H. Fang. "Optimal crashworthiness design of a spot-welded thin-walled hat section", 2006, 42(10), pp. 846-855.

V. Tarigopula, M. Langseth, and O.S. Hopperstad. "Axial crushing of thin-walled high-strength steel sections", 2006, 32(5), pp. 847-882.

M.D. White, N. Jones, and W. Abramowicz. "A theoretical analysis for the quasi-static axial crushing of top-hat and double-hat thin-walled sections", 1999, 41(2), pp. 209-233.

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Published

2021-04-28