Modeling of the Properties of Wood Composite Materials by Parametric Identification

Abstract

AbstractThis article presents the results of modeling the properties of wood composite board materials without binders, made on the basis of unwashed lignocellulose fibers activated by steam explosion treatment. The experimental technique is described, as well as the technique for determining the physical properties of the obtained board materials. The paper presents mathematical processing of experimental data on the properties of wood composite board materials (density), carried out in accordance with the method of parametric identification of statistical models of multidimensional experiments in the CurveExpert 1.4 software environment. This technique is used to process experimental data with obtaining mathematical expressions in exponential and demonstrative form (less often in linear), the laws of which have physical meaning, in contrast to polynomial models obtained as a result of regression analysis. A three-dimensional statistical model of the influence of molding pressure and pressing temperature on the density and strength of wood composite board materials based on unwashed activated fibers has been compiled. The research results showed that the pressing temperature and molding pressure contribute to an increase in the density and strength of the samples. The simulation results have shown the effectiveness of the parametric identification method, which makes it possible to obtain models of the dependence of the output quantities on a variety of factors, while the models have a low relative error and are written using mathematical constructs that have physical meaning. The final errors for multivariate models of the density of WCM from unwashed samples are: The absolute error of the model is 31.7 kg/m3, and the relative error of the model is 1.91%. A similar technique for modeling technological processes can underlie the design and technological support of machine-building industries for wood processing technologies.KeywordsWood composite material (WCM)Steam explosion treatmentUnwashed activated fibersSlab materialDensityParametric identification