抄録
In the present paper, thermo-viscoelastic constitutive equation of carbon fiber reinforced plastic is investigated bynumerical approach based on finite element method(FEM) and homogenization theory. The constitutive equation of theCFRP is considered on the Laplace-transformed domain, and it is discussed based on correspondence principle which issatisfied by the each Laplace-transformed elastic moduli. Homogenization theory is employed to estimate the 'homogenizedelastic moduli' of the composite composed of matrix resin and carbon fibers. Using approximation of generalized Maxwellmodel, the relaxation modulus of CFRP is obtained by numerical computation with FEM. The effect of the volumetricloading rate of the carbon fiber and the individual elastic moduli of the fiber and matrix on the estimated relaxation moduliare discussed from the results of numerical demonstration in detail.
