Wood composite warping: Modeling and simulation

摘要

Warping, which is defined as the out-of-plane deformation of an initially flat panel, is a longstanding problem associated with secondary manufacturing processes in the wood panel industries. The mechanism of warping is still not fully understood. Unlike previous modeling, this study has developed a new two-dimensional warping model based on mechanics of layered composites. Wood composite panel is regarded as a multilayered composite material in which each layer has different properties, especially when they experience moisture gradient through their thickness. Detailed model development and computer simulation results are presented. Panel parameters such as thickness, MOE. LE, Poisson's ratio, shear modulus, density, and orientation of layer were simulated and quantitative relationships between these parameters and warp were presented. The results should provide a better understanding of wood composite warp.