An applicable orthotropic creep model for wood materials and composites

Abstract Despite the engineering importance of creep composite materials and other fibrous anisotropic load-carrying like wood, there is an apparent lack in useful experimental data 3D. Proposed models are generally not commensurate with realistic from characterization. In present study, orthotropic linear viscoelastic model presented examined on its performance predicting time-dependent nature wood materials. The constitutive equations using hereditary approach. A clear description finite element implementation material given. Since constant Poisson’s ratios a common assumption for composites due to data, this study presents effects ratio study. calibrated against inevitably asymmetric optimization With ratios, results show that able simultaneously capture behaviour three axis such as European beech fibre-reinforced composite. However, relatively poor match was found when were set be constant. Thus, frequently employed should made caution.