Optimization of contents of two-component polydispersed filler by applying the mathematical design of experiment in forming composites for transport repairing

Abstract

The influence of two - component polydispersed filler on the elasticity modulus in flexure and impact resilience of the developed epoxy - polyester composite is analyzed. Regression equation by applying the mathematical design of experiment is found and dependence of output parameters on chosen variable factors is determined. It is proved that introduction of two - component polydispersed filler (in contents of mica - q = 20. . . 30 pts.wt., nitride boron - q = 40. . . 60 pts.wt.) in composite allows to increase significantly parameters of elasticity modulus in flexure to Е = 7.2. . . 7.6 hPa with slight decrease of impact resilience to W = 4.6. . . 4.8 kJ/m². Theoretical analysis of the calculation results of functional relationships is carried out and mathematical model that properly describes behavior of the investigated material is found. Optimal content of main and additional fillers in composite for each property is established using found regression equations. It is determined that composite material in contents of mica q = 20. . . 30 pts.wt. and of nitride boron q = 40. . . 60 pts.wt. has optimal parameters.