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Study on the damage behavior of carbon fiber composite after low-velocity impact under hygrothermal aging

机译：低速湿热效应后碳纤维复合物损伤行为研究

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摘要

In this article, T800 carbon fiber/epoxy resin composite was subjected to hygrothermal aging. By analyzing the mass change, surface morphology before and after aging, infrared spectra, and dynamic mechanical properties, the effect of hygrothermal aging on the composite properties was studied. The hygrothermal aging of the composite after low-velocity impact, the effects of environmental factors on the damaged area, and the post-impact compression properties of composites were studied. The results showed that the saturation moisture absorption rate of the composite after aging (71 degrees C constant temperature) was 0.88%. Upon increasing the impact energy, an indentation appeared before the inflection point at 35 J. When the impact energy was less than 15 J, aging did not affect invisible damage. Above this, the damaged area and number of internal cracks and defects in the composite were increased. After aging, the compressive strength of composite laminates with impact damage decreased obviously. During the aging stage, the residual compressive strength of the sample was the lowest in the moisture saturated state, and hygrothermal aging had little effect on the compression failure mode after impact.
机译：本文对T800碳纤维/环氧树脂复合材料进行了湿热老化试验。通过分析老化前后的质量变化、表面形貌、红外光谱和动态力学性能，研究了湿热老化对复合材料性能的影响。研究了复合材料低速冲击后的湿热老化、环境因素对损伤区域的影响以及复合材料的冲击后压缩性能。结果表明，复合材料老化（71℃恒温）后的饱和吸湿率为0.88%。随着冲击能量的增加，在35 J的拐点之前出现压痕。当冲击能量小于15 J时，老化不会影响无形损伤。除此之外，复合材料中的损伤面积、内部裂纹和缺陷数量都有所增加。老化后，冲击损伤复合材料层合板的抗压强度明显降低。在老化阶段，试样的残余抗压强度在水分饱和状态下最低，湿热老化对冲击后的压缩破坏模式影响不大。

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  • 来源
    《Journal of Applied Polymer Science》 |2021年第18期|共10页
  • 作者

    Zhou Song; Jia Yao Xiong; Xu Liang; Wang Lei; Hui Li;

  • 作者单位

    Shenyang Aerosp Univ Coll Electromech Engn 37 Daoyi South Ave Shenyang 110136 Liaoning Peoples R China;

    Shenyang Aerosp Univ Coll Electromech Engn 37 Daoyi South Ave Shenyang 110136 Liaoning Peoples R China;

    Shenyang Aerosp Univ Coll Electromech Engn 37 Daoyi South Ave Shenyang 110136 Liaoning Peoples R China;

    Shenyang Aerosp Univ Key Lab Fundamental Sci Natl Def Aeronaut Digital Shenyang Peoples R China;

    Shenyang Aerosp Univ Key Lab Fundamental Sci Natl Def Aeronaut Digital Shenyang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    aging; composites; mechanical properties;

    机译：老化;复合材料;机械性能;

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