Scholarlink

<p>Understanding how filament-winding design influences composite microstructure is essential to improve the durability and performance of Type IV pressure vessels. Fiber winding angle affects fiber packing, resin flow, and consolidation, yet its effect on porosity remains insufficiently quantified. In this exploratory study, we investigate how nominal fiber orientation affects porosity in filament-wound carbon fiber–reinforced polymer (CFRP) composites representative of hydrogen storage vessels. Two independently manufactured tubes per ± 15° and ± 30° winding configurations were produced using the same material system and controlled processing conditions to isolate the effect of winding angle. 2D optical microscopy with threshold-based image analysis quantified void area fraction, size, morphology, orientation, and spatial distribution. A multi-level statistical approach separated micrograph-level variability from tube-level trends, enabling robust comparisons. Observations show ± 15° laminates contain fewer but larger voids (~ 79&#xa0;mm⁻²; mean Feret diameter 44.7 ± 0.6&#xa0;μm; aspect ratio 1.55), leading to higher local void area fraction (~ 10.9%). In contrast, ± 30° laminates have more numerous, smaller, and more elongated voids (~ 124&#xa0;mm⁻²; 33.6 ± 0.7&#xa0;μm; 1.74) with lower local void area fraction (~ 7.4%). Void orientation distributions are similar, indicating winding angle affects void formation more than alignment. Spatial analysis shows slightly more regular spacing in ± 15° tubes, with larger inter-void distances and thicker resin regions, potentially improving defect isolation and fatigue resistance. The statistical characterization of porosity developed here provides a quantitative basis for generating realistic representative volume elements (RVEs), supporting numerical modeling, process optimization, and the evaluation of structure–property–performance relationships in composite hydrogen vessels.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Statistical characterization of porosity in filament wound carbon fiber reinforced composites for type IV hydrogen storage vessels

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月17日

查看全文
  • Mahsa Arabkoohi,
  • Isabelle Bruant,
  • Joseph Fitoussi,
  • Jihed Zghal,
  • Sakineh Fotouhi,
  • Mohammad Fotouhi,
  • Mohammadali Shirinbayan

摘要

Understanding how filament-winding design influences composite microstructure is essential to improve the durability and performance of Type IV pressure vessels. Fiber winding angle affects fiber packing, resin flow, and consolidation, yet its effect on porosity remains insufficiently quantified. In this exploratory study, we investigate how nominal fiber orientation affects porosity in filament-wound carbon fiber–reinforced polymer (CFRP) composites representative of hydrogen storage vessels. Two independently manufactured tubes per ± 15° and ± 30° winding configurations were produced using the same material system and controlled processing conditions to isolate the effect of winding angle. 2D optical microscopy with threshold-based image analysis quantified void area fraction, size, morphology, orientation, and spatial distribution. A multi-level statistical approach separated micrograph-level variability from tube-level trends, enabling robust comparisons. Observations show ± 15° laminates contain fewer but larger voids (~ 79 mm⁻²; mean Feret diameter 44.7 ± 0.6 μm; aspect ratio 1.55), leading to higher local void area fraction (~ 10.9%). In contrast, ± 30° laminates have more numerous, smaller, and more elongated voids (~ 124 mm⁻²; 33.6 ± 0.7 μm; 1.74) with lower local void area fraction (~ 7.4%). Void orientation distributions are similar, indicating winding angle affects void formation more than alignment. Spatial analysis shows slightly more regular spacing in ± 15° tubes, with larger inter-void distances and thicker resin regions, potentially improving defect isolation and fatigue resistance. The statistical characterization of porosity developed here provides a quantitative basis for generating realistic representative volume elements (RVEs), supporting numerical modeling, process optimization, and the evaluation of structure–property–performance relationships in composite hydrogen vessels.