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<p>Mechanical behavior of hybrid composites, is influenced by fiber sequence and loading conditions, which determines the load distribution and damage progression especially under impact loadings commonly encountered in aircraft industry. Combined effects of fiber sequence and impactor geometry on the low-velocity impact response of carbon/basalt hybrid epoxy composites were investigated to see the how impactor-induced loads interact with outer-layer fiber type, governing damage initiation and propagation mechanisms. This study deals with the investigation of hybrid laminate design for enhanced impact resistance and damage tolerance. Low-velocity impact behavior of carbon/basalt hybrid epoxy composites was experimentally conducted by the fiber stacking sequences as [C₃B₂C₃], [B₃C₂B₃] and impactor nose shapes. Impact tests were conducted at the energies of 10, 20, and 30&#xa0;J using a drop-weight testing machine. Results revealed that although carbon fibers on the exterior provided higher stiffness and a stronger initial response but also led to localized and catastrophic failures such as fiber breakage and delamination. In contrast, basalt fibers on the outer layers enhanced energy absorption capability and provided more progressive damage mechanisms, including fiber pull-out and widespread delamination. Furthermore, larger impactor diameters facilitated more distributed loading and higher energy dissipation.</p>

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Coupled effects of fiber sequence and impactor geometry on low-velocity impact behavior of carbon/basalt hybrid composites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月6日

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  • Mehmet İskender Özsoy

摘要

Mechanical behavior of hybrid composites, is influenced by fiber sequence and loading conditions, which determines the load distribution and damage progression especially under impact loadings commonly encountered in aircraft industry. Combined effects of fiber sequence and impactor geometry on the low-velocity impact response of carbon/basalt hybrid epoxy composites were investigated to see the how impactor-induced loads interact with outer-layer fiber type, governing damage initiation and propagation mechanisms. This study deals with the investigation of hybrid laminate design for enhanced impact resistance and damage tolerance. Low-velocity impact behavior of carbon/basalt hybrid epoxy composites was experimentally conducted by the fiber stacking sequences as [C₃B₂C₃], [B₃C₂B₃] and impactor nose shapes. Impact tests were conducted at the energies of 10, 20, and 30 J using a drop-weight testing machine. Results revealed that although carbon fibers on the exterior provided higher stiffness and a stronger initial response but also led to localized and catastrophic failures such as fiber breakage and delamination. In contrast, basalt fibers on the outer layers enhanced energy absorption capability and provided more progressive damage mechanisms, including fiber pull-out and widespread delamination. Furthermore, larger impactor diameters facilitated more distributed loading and higher energy dissipation.