Optimization of composite wood structural components : processing and design choices

Abstract

Decreasing size and quality of the world's forest resources are responsible for interest in producing composite wood structural components. Process and design optimization methods are offered in this paper. Processing concepts for wood composite structural products are reviewed to illustrate manufacturing boundaries and areas of high potential. Structural optimization principles are introduced to provide an overview of design requirements for various structural elements. An approach to the optimal design of a simple joist is presented. The approach allows the optimization for a variety of possible limit states using minimum weight as the objective function. Three aligned flake materials are used in examples of: (1) minimum weight of the 2 by 10 joists and (2) maximum stiffness-to-weight ratio for a uniformly loaded long span. Results from the optimizations show how beam geometry affects efficiency. The beam volume that is critically stressed in shear is seen as controlling the efficiency of rectangular members. Alternative shapes are introduced to minimize the shear critical volume of composite material in flexural members.

Citation

Laufenberg, Theodore L. 1985. Optimization of composite wood structural components : processing and design choices. Proceedings of the 19th Washington State University International Particleboard/Composite Materials Symposium, 1985 March 26-28, Pullman, WA. Pullman, WA : Washington State University, 1985: Pages 77-94.