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首页> 外文期刊>Journal of intelligent material systems and structures >Healing of fatigue delamination cracks in carbon-epoxy composite using mendable polymer stitching
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Healing of fatigue delamination cracks in carbon-epoxy composite using mendable polymer stitching

机译：可修补聚合物缝合法修复碳-环氧复合材料中的疲劳分层裂纹

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摘要

This article presents an experimental investigation into the mode I delamination fatigue properties and fatigue crack healing mechanism of a self-healing carbon fibre-epoxy composite containing mendable thermoplastic stitches. Mode I inter-laminar fatigue tests using double cantilever bending specimens show that through-the-thickness reinforcement of the composite with mendable poly(ethylene-co-(methacrylic acid)) stitches is highly effective in healing delamination cracks and restoring the fatigue properties. Aided by a pressure delivery mechanism unique to this type of mendable thermoplastic, the healing agent stored in an interconnected network of stitches is able to flow into narrow delamination cracks. The mode I interlaminar fatigue resistance as well as the fracture toughness of the composite was fully restored by poly(ethylene-co-(methacrylic acid)) stitches. Transverse tension tests were performed to determine the traction law of the healing agent, which controls the healing efficiency and interlaminar toughening mechanism under static and fatigue mode I interlaminar loading.
机译：本文对含可修补热塑性针脚的自愈碳纤维-环氧树脂复合材料的I型脱层疲劳性能和疲劳裂纹愈合机理进行了实验研究。使用双悬臂弯曲试样的模式I层间疲劳测试表明，采用可修补的聚（乙烯-共-（甲基丙烯酸））缝线对复合材料进行全厚度加固对修复分层裂纹和恢复疲劳特性非常有效。在这种类型的可修补热塑性塑料独有的压力传输机制的辅助下，存储在相互连接的线迹网络中的愈合剂能够流入狭窄的分层裂缝中。复合材料的I型层间抗疲劳性和断裂韧性通过聚乙烯（乙烯-共-（甲基丙烯酸））线迹得以完全恢复。进行横向拉伸试验以确定愈合剂的牵引规律，该规律控制层间静态和疲劳模式I层间载荷下的愈合效率和层间增韧机制。

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  • 作者

    Khomkrit Pingkarawat; Chun H Wang; Russell J Varley; Adrian P Mouritz;

  • 作者单位

    Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Melbourne, VIC, Australia;

    Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Melbourne, VIC, Australia;

    CSIRO Materials Science and Engineering, Clayton South MDC, VIC, Australia;

    Sir Lawrence Wackett Aerospace Research Centre, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, GPO Box 2476, Melbourne, VIC 3001, Australia;

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  • 正文语种 eng
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  • 关键词

    Delamination; polymer matrix composite; healing; stitching;

    机译：分层;聚合物基复合材料;康复;拼接;

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