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<p>This study investigates the low-velocity impact response and damage characteristics of self-piercing riveting (SPR) in hybrid carbon and basalt fiber-reinforced asymmetric composite laminates/aluminum alloy 6061-T651 (AA), focusing on the effect of different fiber types on the impact side. The blend ratio of the carbon/basalt fiber is 33.3%. Two samples for testing: one with the carbon fiber layer on the impact side (CBB) and the other with the basalt fiber layer on the impact side (BBC). Low-velocity impact tests selected impact energies of 5, 7.5, 10, and 12.5&#xa0;J. The results revealed that, as the impact energy increased to 10&#xa0;J, the interlock depth of the BBC joints decreased from 1.87 to 1.27&#xa0;mm, while the interlock depth of the CBB joints decreased from 1.28 to 0.37&#xa0;mm. The interlock structure of the BBC joint was more stable, resulting in higher shear strength. Compared to the CBB joints, the BBC joints absorbed less energy and exhibited stronger resistance to low-velocity impact. This asymmetric laminate design, with the fiber layers of lower elastic modulus and stronger energy absorption placed on the impact side, enhances the SPR joint’s resistance to low-velocity impact, making it a viable option for improving structural durability.</p>

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A Comparing Study on Low-Velocity Impact Properties of Basalt and Carbon Fibers Reinforced Asymmetrical Laminates/Aluminum Alloy 6061-T651 by Self-pierce Riveting

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Zhi-Chao Huang,
  • Hai-Zhou Li,
  • Yu-Qiang Jiang

摘要

This study investigates the low-velocity impact response and damage characteristics of self-piercing riveting (SPR) in hybrid carbon and basalt fiber-reinforced asymmetric composite laminates/aluminum alloy 6061-T651 (AA), focusing on the effect of different fiber types on the impact side. The blend ratio of the carbon/basalt fiber is 33.3%. Two samples for testing: one with the carbon fiber layer on the impact side (CBB) and the other with the basalt fiber layer on the impact side (BBC). Low-velocity impact tests selected impact energies of 5, 7.5, 10, and 12.5 J. The results revealed that, as the impact energy increased to 10 J, the interlock depth of the BBC joints decreased from 1.87 to 1.27 mm, while the interlock depth of the CBB joints decreased from 1.28 to 0.37 mm. The interlock structure of the BBC joint was more stable, resulting in higher shear strength. Compared to the CBB joints, the BBC joints absorbed less energy and exhibited stronger resistance to low-velocity impact. This asymmetric laminate design, with the fiber layers of lower elastic modulus and stronger energy absorption placed on the impact side, enhances the SPR joint’s resistance to low-velocity impact, making it a viable option for improving structural durability.