Tool Part Interaction and Residual Stress Evolution in Constrained Post Cure Dwells
Constrained post cure dwells reduce residual stresses only when dwell temperatures exceed glass transition points to enable shear stress relaxation across tools.
Strip Removal Method
Meaning
Controlled peel and pull procedures designed to remove protective films or sacrificial plies from composite surfaces prevent matrix damage during manufacturing transitions. Selecting an appropriate strip removal method ensures that release plies or surface covers break away cleanly without lifting structural fibers or leaving adhesive residue. The operational scope covers post-cure surface preparation up to final adhesive bonding or coating application.
Surface energy measurements and visual inspection following peel operations confirm that secondary bonding surfaces remain free of contamination. Applying incorrect peel angle or force tears underlying fiber bundles and creates surface flaws that compromise joint strength.
Operational Execution
Angle and speed of peel force application dictate stress distribution along the separation line. Executing a standardized strip removal method minimizes mechanical shock to delicate surface laminates during masking removal. Automated end-effectors maintain constant pull rates during high-volume production operations.
Substrate Protection
Sacrificial layers must separate at the designated interface without transferring siloxane or silicone contaminants to the composite substrate. A validated strip removal method prevents mechanical delamination of top ply layers during manual processing. Clean surface profiles eliminate subsequent solvent washing steps prior to structural bonding.
Efficiency Factor
Tearing release film during demoulding introduces manual rework and slows production line throughput. Standardizing the strip removal method across manufacturing cells reduces part handling times and prevents scrap caused by surface gouging. Process repeatability ensures uniform surface roughness for downstream adhesive applications.