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This study systematically evaluates the post-impact compressive behavior of T300 carbon fiber/epoxy composite laminates under hydrogen conditions, addressing the durability challenges of aerospace materials in coupled environmental and mechanical loading scenarios. To simulate prolonged service exposure, laminates underwent accelerated hydrogen aging (85 °C, 85% RH) prior to being subjected to low-velocity impacts (10–30 J) using a standardized drop-weight apparatus. Residual compressive strength and stiffness were quantified via compression-after-impact (CAI) tests, while damage mechanisms were characterized through ultrasonic C-scanning, digital image correlation (DIC), and microstructural analysis. A coupled hygro-thermo-mechanical finite element model, integrating time-dependent moisture diffusion and viscoelastic damage criteria, was developed to elucidate the interplay between environmental degradation and mechanical failure.The proposed material enhancement protocols and predictive models offer practical solutions for improving the environmental resilience of domestic T300 composites, directly supporting their application in next-generation aircraft under stringent operational conditions.

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Study on the Compressive Mechanical Properties of T300 Composite Laminates After Impact Under Hydrogen Environments

  • 会议论文

  • 发表日期：

    2026年

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  • Yanbin Ma,
  • Yongle Qiao,
  • Xu Zha,
  • Yi Meng

摘要

This study systematically evaluates the post-impact compressive behavior of T300 carbon fiber/epoxy composite laminates under hydrogen conditions, addressing the durability challenges of aerospace materials in coupled environmental and mechanical loading scenarios. To simulate prolonged service exposure, laminates underwent accelerated hydrogen aging (85 °C, 85% RH) prior to being subjected to low-velocity impacts (10–30 J) using a standardized drop-weight apparatus. Residual compressive strength and stiffness were quantified via compression-after-impact (CAI) tests, while damage mechanisms were characterized through ultrasonic C-scanning, digital image correlation (DIC), and microstructural analysis. A coupled hygro-thermo-mechanical finite element model, integrating time-dependent moisture diffusion and viscoelastic damage criteria, was developed to elucidate the interplay between environmental degradation and mechanical failure.The proposed material enhancement protocols and predictive models offer practical solutions for improving the environmental resilience of domestic T300 composites, directly supporting their application in next-generation aircraft under stringent operational conditions.