FFT-based investigation of the shear stress distribution in face-centered cubic polycrystals

The onset of nonlinear effects in metals, such as plasticity and damage, is strongly influenced by the heterogeneous stress distribution at grain level. This work devoted to studying local fcc polycrystals using FFT-based solvers. In particular, we focus on shear stresses resolved slip systems critical driving force for plastic deformations. Specific orientations with respect load direction are investigated linear elastic regime incipient deformations based a large ensemble microstructures. anisotropy single crystal found have crucial influence scatter distribution, whereas Young’s modulus respective governs mean grain. It further demonstrated that, higher anisotropy, deviate from normal better approximated log-normal fit. Comparing full-field simulations Maximum Entropy Method (MEM), reveals that MEM provides an excellent prediction up second statistical moment range. study spatial stresses, boundary identified region pronounced fluctuations starting point yielding during elastic–plastic transition.