Abstract
The viscoplastic constitutive equation of epoxy resin reinforced with carbon nanofiber (CNF) is evaluated using a numerical approach based on the finite element method (FEM). Homogenization theory is employed to estimate the viscoplastic constitutive equation of the composite composed of matrix resin and carbon nanotube. Viscoplastic property of epoxy resin was evaluated by tensile tests under several strain rate. Viscoplastic constitutive equation of CFRP can be estimated numerically by homogenization theory with FEM. The effectiveness of the present study is verified by comparing the experimental and numerical results of stress-strain relation of the composite changing strain rates.
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