Effect of the mold on the residual strain field monitored with optical fibers sensors in resin transfer molding processes

Fiber Bragg gratings provide accurate and non-intrusive strain sensors. They can be embedded into fibrous preforms to deliver real-time information on ongoing processes. The possibility of using the strain-induced birefringence of the fiber Bragg gratings to extract information on the effective strain state of the composite at the end of the process has already been demonstrated. This effect can be used to estimate the residual strain field in...