Abstract
Composite material is made by two or more different materials with different properties by physical or chemical method. Composite material possesses special features which the materials compose it don't have. Stiffness, strength and thermal properties of composite material are promoted obviously compared with isotropic material. Due to the non-symmetric fiber layer-ups, additional bending deformations may occur in case that the composite beam is applied with centrifugal force or uniform thermal force, which has significant effect on dynamic performance of the multi-body system. In this paper, the influence of the additional bending deformation caused by centrifugal force and temperature variation on the dynamic performance of composite flexible multi-body system was investigated. Based on constitutive and nonlinear strain-displacement relation, variational dynamic equation for each composite planar beam was established by using virtual work principle and finite element method, and then dynamic equations for composite flexible multi-body system were derived. Simulation of the crank-slider system shows that for non-symmetric composite beams, difference i n the elastic modulus and thermal expansion coefficient may lead to additional bending deformation, which would significantly influence dynamic performance of the system.
