Metals

Calculation of the influence of plastic deformation on the evolution of crack stress intensity factors in a body-centered cubic crystal

D. N. Karpinskii, S. V. Sannikov

Southern Federal University, Rostov-on-Don

Abstract: The evolution of stress intensity factors in a mixed loading mode has been calculated for different cleavage planes, the direction of the crack front, and the easy slip systems near the crack tip in a body-centered cubic (bcc) crystal. Calculations take into account the mutual influence of the plastic deformation and crack tip shape as well as $T$ stress. The dependence of screening the crack tip by dislocations on the crack orientation, easy slip system, and fracture modes is found.

Received: 19.05.2014
Accepted: 12.09.2014

 English version: Physics of the Solid State, 2015, 57:3, 563–568

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