The strain development during the cure stage of a polymer matrix composite manufacturing process is mainly caused by the thermal expansion and the resin crosslinking shrinkage. In this non-isothermal cure stage, the electrical resistance of a carbon fiber depends on the temperature and the strain the carbon fiber experienced. In this paper, a methodology to decouple the temperature and strain effects is developed. An experimental study for characterizing the strain development history during the cure stage of a single fiber polymer matrix composite is presented. The strain development history recorded by the single carbon fiber sensor (CFS) is analyzed and discussed.

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