Scholarlink

<p>The response mechanisms and performance evolution of a new Double-Double (DD) laminate configuration during hygrothermal aging remain unclear. This limits its application in high-humidity environments. Two configurations were designed for glass fiber-reinforced DD laminates: DD-A, which is equivalent in in-plane stiffness, and DD-D, which is equivalent in bending stiffness. Tests were conducted under accelerated water bath aging conditions at 80&#xa0;°C. Moisture absorption, dynamic mechanical properties, and post-aging mechanical properties were characterized. The saturated moisture absorption rate of DD laminates differed little from that of Quad laminates, but the diffusion coefficient was lower. After saturation, the tensile strength retention of DD-A laminates was 18.5% higher than that of Quad laminates. In the three-point bending test, the strength retention of DD-D was over 13% higher than that of the Quad laminate. However, in the open-hole tensile test, the Quad performed better than both DD variants. These contrasting trends suggest that the uniform DD structure enhances resistance to hydrothermal under uniform loading but is more susceptible to damage when geometric discontinuities impair matrix-dominated load transfer.</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

Hygrothermal Aging Behavior of Glass Fiber-Reinforced Double-Double Laminates

  • 期刊论文

  • 发表日期：

    2026年6月19日

查看全文
  • Xiaoqiang Wang,
  • Xu Zhang,
  • Xingling Chen,
  • Yuhan Chen,
  • Tingdi Zhao,
  • Xinhua Liu,
  • Chengkun Ma,
  • Shaowei Lu,
  • Lu Zhang,
  • Hakim Hushvaktov,
  • Yuxiang Chen

摘要

The response mechanisms and performance evolution of a new Double-Double (DD) laminate configuration during hygrothermal aging remain unclear. This limits its application in high-humidity environments. Two configurations were designed for glass fiber-reinforced DD laminates: DD-A, which is equivalent in in-plane stiffness, and DD-D, which is equivalent in bending stiffness. Tests were conducted under accelerated water bath aging conditions at 80 °C. Moisture absorption, dynamic mechanical properties, and post-aging mechanical properties were characterized. The saturated moisture absorption rate of DD laminates differed little from that of Quad laminates, but the diffusion coefficient was lower. After saturation, the tensile strength retention of DD-A laminates was 18.5% higher than that of Quad laminates. In the three-point bending test, the strength retention of DD-D was over 13% higher than that of the Quad laminate. However, in the open-hole tensile test, the Quad performed better than both DD variants. These contrasting trends suggest that the uniform DD structure enhances resistance to hydrothermal under uniform loading but is more susceptible to damage when geometric discontinuities impair matrix-dominated load transfer.