Investigation on low-velocity impact response and energy absorption of enhanced X-shaped lattice mechanical metamaterials

LU Chang; HU Chaolei; JIAO Jinze; WANG Zhipeng; WU Tianxing; BAI Chunyu; WANG Jizhen; GUO Yazhou; ZHANG Yu; LI Xiaocheng; QIN Qinghua

doi:10.11883/bzycj-2025-0101

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LU Chang, HU Chaolei, JIAO Jinze, WANG Zhipeng, WU Tianxing, BAI Chunyu, WANG Jizhen, GUO Yazhou, ZHANG Yu, LI Xiaocheng, QIN Qinghua. Investigation on low-velocity impact response and energy absorption of enhanced X-shaped lattice mechanical metamaterials[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0101

Citation:

LU Chang, HU Chaolei, JIAO Jinze, WANG Zhipeng, WU Tianxing, BAI Chunyu, WANG Jizhen, GUO Yazhou, ZHANG Yu, LI Xiaocheng, QIN Qinghua. Investigation on low-velocity impact response and energy absorption of enhanced X-shaped lattice mechanical metamaterials[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0101

Citation:

LU Chang, HU Chaolei, JIAO Jinze, WANG Zhipeng, WU Tianxing, BAI Chunyu, WANG Jizhen, GUO Yazhou, ZHANG Yu, LI Xiaocheng, QIN Qinghua. Investigation on low-velocity impact response and energy absorption of enhanced X-shaped lattice mechanical metamaterials[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0101

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Investigation on low-velocity impact response and energy absorption of enhanced X-shaped lattice mechanical metamaterials

doi: 10.11883/bzycj-2025-0101

1.
Xi’an Key Laboratory of Extreme Environment and Protective Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
2.
Xuzhou XCMG Excavator Machinery Co., Ltd., Xuzhou 221000, Jiangsu, China
3.
The 705 Research Institute, China State Shipbuilding Corporation Limited, Xi’an 710077, Shaanxi, China
4.
National Key Laboratory of Strength and Structural Integrity, Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics, Aircraft Strength Research Institute of China, Xi’an 710065, Shaanxi, China

Received Date: 2025-03-28
Rev Recd Date: 2025-06-10

Available Online: 2025-06-12

Abstract

Abstract

Lattice mechanical metamaterials have been widely used in various fields due to the lightweight, flexible designability and excellent impact resistance. In this paper, an enhanced X-shaped lattice mechanical metamaterial was designed and fabricated by selective laser melting. The dynamic crushing behavior and energy absorption mechanism of this metamaterials subjected to low-velocity impact were explored experimentally and numerically. The influence of impact velocity on the deformation mode and energy absorption capability of the enhanced X-shaped lattice mechanical metamaterials was analyzed. It is shown that the impact velocity has significant effects on the deformation modes of the mechanical metamaterials. At the lower impact velocities, the deformation mode of lattice mechanical metamaterials resembles that observed under quasi-static compression, characterized by the layer-by-layer crushing mode of the cells around the shear band. At the higher impact velocities, the deformation mode of lattice mechanical metamaterials transitions from X-shaped shear band to V-shaped shear band, and finally evolves into an arc-shaped shear band. The further study suggests that enhanced X-shaped lattice mechanical metamaterial exhibits a certain degree of velocity sensitivity. With the increase of the impact velocity, the initial peak stress, plateau stress, and specific energy absorption all increase correspondingly.
- mechanical metamaterial,
- low-velocity impact,
- dynamic response,
- deformation mode,
- energy absorption

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References(26)

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