中国民航大学学报 ›› 2019, Vol. 37 ›› Issue (3): 60-64.

• 工程技术 • 上一篇    

基于电阻法的碳纤维断裂损伤识别研究#br#

卢翔,赵振耀,蔺越国,贾宝惠
  

  1. (中国民航大学航空工程学院,天津300300)
  • 出版日期:2019-06-27 发布日期:2020-04-01
  • 作者简介:卢翔(1969—),男,安徽阜阳人,副教授,博士,研究方向为复合材料结构设计.
  • 基金资助:
    中国民航局重大专项(MHRD20160105);中国民航大学预研重大项目(3122014P002);中央高校基本科研业务费专项(3122016D012)

Carbon fiber fracture recognition based on electrical resistance method#br#

LU Xiang, ZHAO Zhenyao, LIN Yueguo, JIA Baohui#br#   

  1. (College of Aeronautical Engineering, CAUC, Tianjin 300300, China)
  • Online:2019-06-27 Published:2020-04-01

摘要: 利用电阻法识别拉伸状态下碳纤维增强树脂基复合材料内部纤维的断裂情况, 为实现飞机复合材料结构的在线健康监控进行初步的理论探索。针对T800 型碳纤维单向铺层的复合材料层合板试件[0]8 进行通电状态下的拉伸试验和有限元仿真模拟。结果表明,电阻法可较好地反映纤维断裂情况,同时给出电阻法识别T800 型纤维断裂的判断依据:在电阻变化率ΔR/R0 达到0.25 前,纤维仅发生弹性变形;在ΔR/R0 达到0.25 时,纤维出现断裂;在ΔR/R0 达到3.5 时,纤维损伤严重。

关键词: 碳纤维, 复合材料, 电阻法, 有限元分析

Abstract: Electrical resistance method is used to identify the internal fiber fracture of CFRP under tension. A preliminary theoretical exploration is carried out to realize on-line health monitoring on aircraft composite structure. Energized tension test and finite element simulation are conducted aiming at the unidirectional laminate [0]8 of T800 carbon fiber. It is proven that the electrical resistance method can soundly reflect fiber fracture. The judging standard of T800 fiber fracture by electrical resistance method is given: before resistance changing rate ΔR/R0 reaches 0.25, only fiber elastically deformation occurs; when ΔR/R0 reaches 0.25, fiber breaks; when ΔR/R0 reaches 3.5, the serious fiber damage occurs.

Key words: carbon fiber, composite, electrical method, finite element analysis

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