Experimental study and in-situ FBG monitoring of process-induced strains during autoclave co-curing, co-bonding and secondary bonding of composite laminates

The geometric stability of bonded structural parts, such as self-stiffened panels, is a critical issue in aeronautics. However, autoclave curing and bonding large complex integrated primary structures often induce distortions compromising their stability. Composite cure-induced strains have been extensively studied the literature but influence adhesive on these has overlooked. More experimental data are therefore necessary to properly understand its process-induced behaviour during cure. present paper reports wide range new investigations showing non-negligible composite assemblies. presented include post-cure distortion measurements, optical microscope imaging, micro-tomography imaging FBG in-situ strain monitoring an process. These experiments demonstrate impact film manufacturing process final