Stress Distribution in the Wood Ahead of a Cutting Tool

The cleavage line in the wood ahead of a cutting tool during machining is investigated by means of both conformal-transformation techniques and photoelasticity. The theoretical experimental stress distributions shown give an insight into the decay of stresses ahead of the tool and are valuable for future analyses of the chip-formation phenomena. It was concluded that the normal stress distributions of the cleavage line are parabolic or of higher degree and decrease to approximately 20 percent of the applied stress at a depth of 1.0 chip thickness.

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