ELASTIC-PLASTIC FIELDS NEAR CRACK TIP GROWINGSTEP-BY-STEP IN A COMPRESSIBLE-PERFECTLYPLASTIC SOLID

The elastic-plastic fields near the crack tip growing step-by-step in a compressf-ble-perfectly plastic solid are analysed based on the fundamental equations for plane strain pro-blem of perfectly plastic solid, and the asymptotic solutions for stress field near the crack tip are obtained. The solutions show both the evolution process of elastic unloading domain and predict the possibility of the secondary plastic domain. The classical central fan domain must be rec-tified and the stress deviatoric stress n...