Detection And Numerical Simulation Analysis On In-Situ Curing Process Of FRP Large Cones

The glass fiber reinforced plastic large cones with glass fiber reinforced resin-matrix composites molding raw material is used as a large terminal parts of a fixed generator stator coil.The component can restrain the force of electromagnetic vibration on generator and the huge impact when the short circuit happened suddenly,to ensure the operation safe and steady.At present,the large generator technology introduced from foreign countries in our nation,the terminal fixation of generator stator use the glass fiber reinforced plastic large cones basically.The curing process is complicated and difficult because of the cone glass fiber reinforced plastic ring wall is thickness and volume is larger.Traditional FRP large cones connect curing furnace,and it was thermoformed after continuous winding.The forming process is bad for resin migration both inside and outside as well as for solvent volatilization outward when the large cones wall is thick or the filament winding tension is presence,resulting in extensive air bubbles generating,restricted the forming efficiency of large cones and product performance.In this paper we study on new curing process(in-situ curing process)of FRP large cones.Based on the numerical simulation we optimize traditional single curing process of large cones.Internal heat-curing and after curing are collaborative form of in-situ curing process.Simulations of FRP lager cones use FEM on in-situ curing process.We developed a series numerical simulation for in-situ curing process of FRP large cones based on the finite element simulation software ANSYS and APDL parametric language.Numerical simulations imitate variation law of temperature and degree of cure for FRP large cones.At the same time we set up thermal chemical model and reaction kinetics model for curing process of FRP large cones.Mathematical model of the FEM is given to prove the validity of the algorithm.We use FBG demodulation instrument in the actual test.The nature of the FBG is sensitive for temperature and stress.It realized the purpose of detection of in-situ solidification temperature for FRP large cones on real-time.In this paper,a concrete analysis results show that heat from the inside-out passed one by one and the bigger the thickness of the peak value of temperature change in glass fiber reinforced plastic cone ring in-situ solidified range.Maximum solidification thickness is 8 cm.Out of 8 cm can be completely cured after curing part by in-situ solidification process.In situ after curing,taper ring main produce relatively large variable in the shape of inward contraction,in which the biggest variable is 0.21 mm.Small taper ring end shape variables are small.Detection sensor testing data provides in the online control compared with the results of numerical simulation analysis,the comparison results are approximate,real and effective detection process.And the numerical simulation analysis is accurate and feasible.