Deformation Analysis of Electric SUV Crash Box: Comparison Between Hollow and 3D-Printed Lattice Core Models Using ANSYS Explicit Dynamics

Moh. Ahnaf Aqil; Ferly Isnomo Abdi; Sudirman Rizki Ariyanto; Diah Wulandari

doi:10.51278/ajse.v4i2.2096

Authors

Moh. Ahnaf Aqil State University of Surabaya
Ferly Isnomo Abdi State University of Surabaya, Indonesia
Sudirman Rizki Ariyanto State University of Surabaya, Indonesia
Diah Wulandari State University of Surabaya, Indonesia

DOI:

https://doi.org/10.51278/ajse.v4i2.2096

Abstract

The development of SUV electric vehicles requires a crash box system that is able to reduce deformation more effectively than conventional hollow designs that tend to be unstable when subjected to high-energy impacts. This study compared the performance of three crash box models, namely hollow, lattice 3D-printed core, and lattice with internal divider wall using ANSYS Explicit Dynamics simulation. The main parameters analyzed include the folding pattern of collapse and maximum deformation as indicators of structural stability. The simulation results showed that all models were in concertina deformation mode, but the stability levels differed significantly. The crash box hollow recorded the largest deformation of 47,579 mm, while the divider-less lattice model decreased to 38,899 mm. The lattice configuration with divider walls is the most superior design with a minimum deformation of 31,098 mm, as well as a more symmetrical and controlled fold pattern. These findings confirm that the integration of the lattice structure, especially with the internal divider is capable of increasing rigidity and inhibiting axial buckling without significant mass gain. Further research is recommended evaluating lattice topology variations and experimental tests as verification of numerical results.

References

T. Dabasa, H. G. Lemu, and Y. Regassa, “A Review on the Crashworthiness of Bio-Inspired Cellular Structures for Electric Vehicle Battery Pack Protection,” Computation, vol. 13, no. 9, p. 217, 2025.

K. Kouchakzadeh, S. A. Yousefsani, and J. Rezaeepazhand, “Energy absorption improvement of a cylindrical sandwich structure with auxetic core,” Mech. Based Des. Struct. Mach., pp. 1–18, 2025.

Q. Fu, X. Deng, S. Xu, and X. Guang, “Novel bionic crashworthiness structures that simultaneously achieves high specific energy absorption and high crushing force efficiency,” Mech. Adv. Mater. Struct., pp. 1–20, 2025.

S. B. Ganapathy and A. R. Sakthivel, “Investigation on the compressive characteristics and optimization of design parameters of a novel functionally graded cell structure,” Funct. Compos. Struct., vol. 6, no. 1, p. 15009, 2024.

P. K. Alagesan, G. Krishnan, S. K. Sahu, A. Kumaresan Gladys, S. Subbarayan, and Q. Ma, “Crashworthiness performance of 3D printed thermoplastic polymer composite hexagonal multi-cellular tubes: A biomimetic approach for enhanced energy absorption,” J. Thermoplast. Compos. Mater., p. 08927057251368873, 2025.

G. Sun, T. Pang, J. Fang, G. Li, and Q. Li, “Parameterization of criss-cross configurations for multiobjective crashworthiness optimization,” Int. J. Mech. Sci., vol. 124, pp. 145–157, 2017.

Y. Zhang et al., “Crashworthiness design of car threshold based on aluminium foam sandwich structure,” Int. J. crashworthiness, vol. 27, no. 4, pp. 1167–1178, 2022.

A. G. Hanssen, M. Langseth, and O. S. Hopperstad, “Static and dynamic crushing of square aluminium extrusions with aluminium foam filler,” Int. J. Impact Eng., vol. 24, no. 4, pp. 347–383, 2000.

R. Lu, W. Gao, X. Hu, W. Liu, Y. Li, and X. Liu, “Crushing analysis and crashworthiness optimization of tailor rolled tubes with variation of thickness and material properties,” Int. J. Mech. Sci., vol. 136, pp. 67–84, 2018.

L. Wan, D. Hu, H. Zhang, and Z. Yang, “Energy absorption of foam-filled TPMS-based tubular lattice structures subjected to quasi-static lateral crushing,” Eng. Struct., 2024, doi: 10.1016/j.engstruct.2024.118581.

N. Vandenberghe and E. Villermaux, “Geometry and fragmentation of soft brittle impacted bodies,” Soft Matter, vol. 9, no. 34, pp. 8162–8176, 2013.

C. Gong, J. Liu, Y. Han, Y. Hu, H. Yu, and R. Zeng, “Safety of Electric Vehicles in Crash Conditions: A Review of Hazards to Occupants, Regulatory Activities, and Technical Support,” IEEE Trans. Transp. Electrif., vol. 8, pp. 3870–3883, 2022, doi: 10.1109/tte.2021.3136126.

P. Bogahawaththage and M. R. Bogahawaththa, “Dynamic Response and Energy Absorption of Fractal Inspired Porous Structures,” 2025, UNSW Sydney.

A. Praveen Kumar, K. Giridharan, S. K. Sahu, K. G. Ashok, and S. Sathiyamurthy, “Experimental investigation of biomimetic 3D-printed hierarchical hexagonal tubes for enhanced energy absorption,” Macromol. Res., pp. 1–15, 2025.

A. R. Bernard, M. M. Yalçın, and M. S. A. ElSayed, “Crashworthiness Investigations for 3D-Printed Multi-Layer Multi-Topology Engineering Resin Lattice Materials,” Materials (Basel)., vol. 17, no. 19, p. 4844, 2024.

J. Wang, Y. Li, G. Hu, and M. Yang, “Lightweight research in engineering: a review,” Appl. Sci., vol. 9, no. 24, p. 5322, 2019.

P. Bunsri, S. Lophisarn, P. Panpetch, P. Jongpradist, and S. Kongwat, “Study on crushing behaviors of the crash box with truss-lattice and cellular structures,” 12TH Int. Conf. Mech. Eng. (TSME-ICoME 2022), 2024, doi: 10.1063/5.0206303.

W. Hou, P. He, Y. Yang, and L. Sang, “Crashworthiness optimization of crash box with 3D-printed lattice structures,” Int. J. Mech. Sci., 2023, doi: 10.1016/j.ijmecsci.2023.108198.

K. Chawla et al., “Property optimized energy absorber for automotive bumpers utilizing multi-material and structural design strategies,” Suppress. Some., vol. 253, p. 113724, 2025.

S. Patil, R. Wani, and S. Umale, “Explicit Dynamics Crash Analysis of Car for Different Materials using Ansys,” Int. Res. J. Eng. Technol., vol. 9, pp. 2589–2596, 2022.

A. Ciampaglia, D. Fiumarella, C. B. Niutta, R. Ciardiello, and G. Belingardi, “Impact response of an origami-shaped composite crash box: Experimental analysis and numerical optimization,” Compos. Struct., vol. 256, p. 113093, 2021.

Y. Baimark, W. Rungseesantivanon, and N. Prakymoramas, “Improvement in melt flow property and flexibility of poly (L-lactide)-b-poly (ethylene glycol)-b-poly (L-lactide) by chain extension reaction for potential use as flexible bioplastics,” Suppress. Some., vol. 154, pp. 73–80, 2018.

S. Wang and D. Wang, “Crashworthiness-based multi-objective integrated optimization of electric vehicle chassis frame,” Arch. Civ. Mech. Eng., vol. 21, no. 3, p. 103, 2021.

S. Susanth, R. Murugan, C. R. S, P.-T. Doutre, and F. Vignat, “Design and Analysis of An Automotive Crash Box Using Strut Based Lattice Structures,” J. Comput. Nonlinear Dyn., 2024, doi: 10.1115/1.4066379.

D. B. Darmadi, B. R. Anwari, J. T. Mesin, F. Teknik, and U. Brawijaya, "ANALYSIS OF ENERGY ABSORPTION AND CRASH BOX DEFORMATION PATTERN WITH VARIATIONS IN THE TAPERED ANGLE OF CRASH BOX WALLS IN FRONTAL DIRECTIONAL COLLISION SIMULATION TEST," vol. 6, no. 1, pp. 75–83, 2015.

M. A. Choiron, Z. Ida, A. Purnowidodo, and A. Rivai, “Energy Absorption and Deformation Pattern Analysis of Initial Folded Crash Box Subjected to Frontal Test,” vol. 2, pp. 1–8, 2017, doi: 10.22219/jemmme.v2i1.4689.