Abstract
Plane-strain stress and slip-line fields near the sharp and round tips of wedge-shaped notches in perfectly plastic pressure-sensitive materials are investigated. The Drucker-Prager yield criterion is adopted to describe the material yielding behavior. Notch-tip stress and slip-line fields are first established for a sharp notch. Then the notch-tip stress and slip-line fields for a round notch tip are obtained. The results indicate that as the wedge angle increases, the opening stress and hydrostatic tension ahead of the tip of the sharp notch decrease. Also, as the wedge angle increases, the extent of the exponential spiral zone ahead of the round notch tip decreases and, consequently, the maximum opening stress and hydrostatic tension ahead of the tip decrease.
