Study On Thermal Curing Deformation Of Carbon Fiber Composites

The composites reinforced by carbon fibers are wildly used in the aviation industry due to the low weight and high strength.However,with the effect of the complexity and integration of the shapes of the aviation products,it is important to study the curing deformation of the carbon fiber reinforced composites during the autoclave process.For further study of the curing deformation,the carbon fiber reinforced composites during the autoclave process are investigated in this paper and the deformation rules are also discussed.In addition,according to the working methods of the composite structures and the autoclave working principles and processes,the heat transfer paths and ways during the autoclave process are analyzed.Moreover,the temperature field analysis is carried out by a numerical simulation approach based on the heat and chemical change theories as well as the equation of heat conduction.During the temperature field analysis,the effects of related processing parameters are stated which is further supplied the data for optimizing these parameters.The curing deformation of the composite structures is analyzed based on the finite element method and the theories of the thermal deformations.And based on the test part,the curvature radius of each node and the variation of the angle between nodes are measured.Furthermore,a compensation method based on the surface nodes is proposed,acting on the mold surface,is proposed to modify the mold surface to decrease the curing deformation.Therefore,the molding precisions are improved.And the productive cycle and manufacturing cost are shortened and reduced.