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

Abstract

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

CLC Number:

LU Xiang, ZHAO Zhenyao, LIN Yueguo, JIA Baohui. Carbon fiber fracture recognition based on electrical resistance method#br#[J]. Journal of Civil Aviation University of China, 2019, 37(3): 60-64.

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