COMPARISON BETWEEN NUMERICAL AND PHYSICAL MODEL OF LIGNOCELLULES MATERIALS SUBJECTED TO CYCLIC BENDING

Abstract

The paper aims to compare analysis of the numerical models with the physical ones regarding the static and cyclic stresses behavior of a composite material. The use of simplifying assumptions or hypotheses regarding material behavior - either in the linear elastic or elastic-plastic domain can influence the magnitude of the numerical error compared to the experimental results. In this study, the behavior of a lignocelluloses composite material with quasi-isotropic properties subjected to three point bending (static and dynamic-pulsating) was analyzed with finite elements, starting from the experimental experiments performed in advance. The modeling was based on two hypotheses regarding the behavior of the material: linear-elastic material and elastic plastic material. The results of the FEM analysis revealed that the modeling with an elastic plastic material presents the best approximation of the experimental results: the error in the voltages is 0.8% and 5% in the case of the displacements.