Characterization and Modeling of Oriented Strand Composites.

摘要

A strong relationship exists between the spatial structure of a wood-strand composite and its compaction characteristics, density, mechanical properties, dimensional stability, and fastener performance. The following research proposes a physical model to represent an oriented strand composite panel and applies a mechanics based approach to estimate its elastic properties. The objectives of this research were to 1) review literature on recent progress in characterizing the structure and modeling of wood-strand composites, 2) understand the effects of undulating strands on the elastic behavior of a wood-strand composite and develop a general constitutive model to predict the elastic properties as a function of strand waviness, 3) characterize the elastic properties of strands and develop a response model to account for the effects of hot pressing, 4) quantify key random variables for characterizing the three dimensional structure of an oriented strand composite, and 5) validate the fiber undulation model to predict the elastic properties of an oriented strand composite.