Void growth versus void collapse in a creeping single crystal

Void behaviors from low to high triaxialities: Transition from void collapse to void coalescence

“…Srivastava and Needleman (2013) have carried out numerical analyses on void growth and void collapse in a creeping single crystal governed by crystal plasticity constitutive relation under a constant stress triaxiality of 1/3 and three Lode parameter values of ±1 and 0. Their results M A N U S C R I P T…”

Phenomenological modeling of the effect of specimen thickness on the creep response of Ni-based superalloy single crystals

“…Depending on the temperature and stress level, the main damage mechanism is either the nucleation of cleavage-like cracks or void nucleation. At the low value of stress triaxiality in uniaxial tension, void growth does not contribute [28,29]. The surface damage under high temperature and low stress in the experiments of Refs.…”

“…[13] and the finite element calculations of void evolution in Refs. [28,29]. However, the model contains failure parameters that were chosen to fit experimental data.…”

“…The model draws on the experimental observations of Srivastava et al [13] and the detailed finite element calculations in Refs. [28,29]. Numerical results are presented and a quantitative comparison is made with the experimental results in Refs.…”

“…Finite element calculations of void growth in a creeping singlecrystal in Refs. [28,29] showed that void growth at these values of v and L is limited but that the evolving void shape can give a significant stress concentration near the void surface even though creep initially relaxes stresses.…”