Measurement of Strain in Wood Cutting Using Digital Image Correlation Method

When a cutting force is applied to the workpiece in wood cutting processes, stress and strain are distributed near the cutting edge. Fracture occurs and a chip is produced when the local stress and strain exceed the threshold corresponding to the mechanical strength of wood. In order to control the chip production, the strain distribution near the cutting edge is necessary to be controlled, or otherwise machining defects such as torn grain and fuzzy grain may occur. This paper summarized the author's works on the measurement of the strain near the cutting edge in slow-speed orthogonal cutting of wood by using a digital image correlation method.