Stress concentration around a circular opening in a wooden plate subjected to twisting moments. The analytical solution of bending and twisting moment and of the stress concentration factors around the circular opening boundary in wooden plate modelled as orthotropic linear elastic material is presented here. The orthotropic plate with the circular opening is subjected to loading by twisting moment in all sides. The aim is to know the influence of the circular hole on concentration of stresses. Realised computations of the normal and shear moment and also of the stresses on the opening boundary are based on the linear theory of elasticity of anisotropic bodies with using of a complex variable method.
Thrust force and torque in the drilling process laminated chipboard. Particleboard is a wood based composite extensively used in wood working. Drilling is the most commonly used machining process in furniture industries. The surface characteristics and the damage free drilling are significantly influenced by the machining parameters. The thrust force developed during drilling play a major role in gaining the surface quality and minimizing the delamination tendency. In this study trials were made eighteen durability tools for different values of the parameters analyzed cut. Based on the results obtained from the study, the effect of cutting parameters selected signals of axial force and torque cutting. Proposed mathematical models using ANOVA, allowing to estimate the cutting forces.
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