Abstract:

The factors significantly affacting the physical-strength properties of the composite are studied by using the quadratic orthogonal roatable combined design scheme. A couple of optimum regression models fiting for various thickness are obtained. According to the theories of wood-panel prosessing and structural machanicals of composite material, analysing the interaction among the critical factors and the strength properties, a combine devalution function about the important indexes is set up. Under the control of the cost bodage, using the princial and methed of optimality, a group of optimum structural-technological parameters adapted for actual production are found. The test results demonstrat that the thickness and the density of the composite and the bamboo sheet thickness critically affact the product strength properties, the adhesive level of the particle take a bigger role, and the hot pressing time have the smallest effect. The interaction among the factors, MOR or MOE is indicated with a group of quadratic surfaces. MOR = 119.4+13.83x₁ + 10.61x₂ - 8.22x₃- 22.86x₅ + 10.01x₁x₃ + 7.29x₁x₅-5.99x₁²-4.39x₂²+7.22x₃². MOE = 10090 + 373.7x₁ + 555x₂ -13778x₅ + 263.3x₁x₂ + 372.2x₁x₃-316.7x₂²

Key words: Bamboo, Composite board, Structure and technology, Optimization