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Correlation of change in electrical resistance with strain of carbon fiber‐reinforced plastic in tension
Author(s) -
Xu Mei Xuan,
Liu Wen Guang,
Gao Zhen Xiang,
Fang Lu Peng,
Yao Kang De
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960606)60:10<1595::aid-app11>3.0.co;2-4
Subject(s) - composite material , materials science , tension (geology) , electrical resistance and conductance , fiber , fracture (geology) , creep , composite number , polyurethane , strain (injury) , polyester , carbon fibers , ultimate tensile strength , medicine
Abstract A study was carried out on the variation in the electrical resistance of carbon fiber‐reinforced unsaturated polyester/polyurethane (UP/PU) IPN composites during static tension, cyclical loading, and unloading in tension. The resistance was found to vary nonlinearly with strain and increase abruptly when the composite approached the fracture. Under a certain constant tension, the change in electrical resistance showed time dependece, and it is suggested that the creep of the IPN network imposed an impact on the variation of resistance. The resistance probing revealed that carbon fiber‐reinforced plastic can function as a sensor that is capable of self‐diagnosing the fatal fracture in composites. © 1996 John Wiley & Sons, Inc.