MATHEMATICAL MODELING OF RESIDUAL TECHNOLOGICAL DEFORMATION OF COMPLEX CROSS-SECTION PROFILES DURING PULTRUSION OF THE POLYMERIC COMPOSITE MATERIALS

Abstract

Work is devoted to the creation of methods of numerical evaluation of the residual strain in the technological profiles of complex cross section of composite materials based on thermosetting binder. In commercial code ABAQUS implemented mathematical model in which the thermomechanical characteristics of the binder (elastic modulus, thermal expansion coefficient, specific heat and thermal conductivity) depend on the temperature and degree of polymerization. Chemical polymerization reaction (curing) of thermosetting matrix is calculated based on the kinematic model. Effective characteristics of fiber or tissue reinforced composite material are determined using a micromechanical model. An example is given buckling prediction of fiberglass channel bar for bridge structures in pultrusion. It was found that the change in the angle due to buckling during the manufacturing process is 0.6 degrees.

Keywords: pultrusion, warping, the kinetics of chemical reactions, curing, composite material, thermosetting binder.