A Simulation Model of 3D Printed Concrete for Penetration Resistance

doi:10.12141/j.issn.1000-565X.240451

Abstract

Abstract:

3D printed concrete is a promising new construction technology with potential applications in military field. As a prerequisite for its application in the military field, 3D printed concrete should possess strong impact resistance, providing reliable protection for military equipment and personnel. Currently, experimental research on the impact resistance of 3D printed concrete is limited by cost issues. Therefore, the use of numerical simulation technology can improve research efficiency, reduce costs, and better reflect the failure processes and damage conditions of 3D printed concrete. However, current numerical simulation technologies for 3D printed concrete do not take into account its unique interface structure, and thus fail to fully reflect the mechanical properties of 3D printed concrete. Based on the results of chloride ion penetration experiments, this study quantitatively characterizes the proportion of the interface region in 3D printed concrete. Using this as a basis, and in conjunction with previous mechanical performance studies, a numerical simulation model for the penetration resistance of 3D printed concrete was established, and its failure behavior was further investigated. By comparing the numerical simulation results with penetration experiment data, it was found that the penetration depth error of the 3D printed concrete model is within 4%, demonstrating its high simulation accuracy. During the penetration process, the 3D printed concrete target exhibits a characteristic of damage concentration at the interface, with the energy absorption at the interface being greater than that in the non-interface regions. As the projectile velocity and target strength increase, the projectile may disintegrate during penetration, leading to a sudden reduction in penetration depth, which further affects the variation of projectile velocity during the penetration process. Measures such as interface reinforcement, improvement of the 3D printing process, and the addition of high-strength aggregates can effectively reduce the penetration damage depth of 3D printed concrete targets, thereby enhancing their penetration resistance.

Key words: 3D printed concrete, chloride ion penetration, penetration damage, numerical simulation

CLC Number:

TU528.01

ZHOU Jiehang, DU Longyu, LAI Jianzhong, YIN Xuexiang, YANG Mingyu. A Simulation Model of 3D Printed Concrete for Penetration Resistance[J]. Journal of South China University of Technology(Natural Science Edition), 2025, 53(8): 137-148.

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样品	界面区像素数	非界面区像素数	界面区占比/%	平均差/%
条间界面1	37	335	11.1	0.4
条间界面2	39	382	10.2
条间界面3	38	365	10.4
层间界面1	43	319	13.4	1.1
层间界面2	42	386	10.8
层间界面3	44	399	11.0

材料类型	抗压强度/MPa	拉伸强度/MPa
3D1	67.8	8.4
3D2	100.4	13.6
3D3	120.3	19.3
层间界面	67.8	7.8
条间界面	67.8	6.8
UHPC	200.0	50.0

区域	内能/J		动能/J
区域	3D2	3D3	3D2	3D3
非界面区	1 009.5	992.9	104.5	91.6
层间界面	99.3	152.2	9.3	9.7
条间界面	123.1	125.7	9.2	8.1
子弹	287.8	277.2	6.3	2.0
UHPC约束层	17.7	19.5	4.1	5.4
钢桶	4.9	5.0	10.1	13.2