Constitutive model for timber fracture under tensile and shear loads

摘要

A 2D homogeneous orthotropic constitutive model of tensile and shear fracture in timber based on a fixed smeared crack approach has been developed and implemented in ATENA? finite element software. The model captures (1) elastic and inelastic behavior in a small deformation range, (2) material orthotropy, both in a linear and non-linear range, (3) cracking across or along fibers, and (4) behavior under unloading/reloading. In this contribution we present model validation through numerical simulations of compact tension shear (CTS) tests of Radiata Pine timber.