Dislocation dynamics simulations of slip systems interactions and forest strengthening in ice single crystal

The contribution of forest interactions to flow stress and strain hardening in ice single crystals is evaluated from dislocation dynamics simulations. The systematic mapping of dislocation–dislocation interactions and the calculation of the interaction strength between slip systems suggest an important contribution of collinear annihilation reactions. Comparison with experiment shows that the forest strengthening induced by a small density of collinear dislocation segments in cross-slip planes may have been underestimated in current models for ice plasticity.