The effect of material orientation on void growth

In this work, we have brought to light the effect of material orientation on void growth. For that purpose, performed finite element calculations using a cubic unit-cell model with spherical at its center and subjected periodic boundary conditions. The behavior is described an elastic isotropic, plastic orthotropic constitutive yielding defined by Yld2004-18p criterion (Barlat et al., 2005). We used multi-point constraint subroutine developed Dakshinamurthy al. (2021) enforce constant values macroscopic stress triaxiality T Lode parameter L in been carried out for different states resulting from combination T=0.33, 1 2, L=−1, 0 (axisymmetric tension, generalized shear axisymmetric compression, respectively). Firstly, numerical simulations which loading directions are collinear orthotropy axes material, so principal strain parallel. Investigation cases minor axis coincides either rolling, transverse or normal direction, has shown initially turns into ellipsoid whose rate growth eccentricity depend both state orientation. A key result specific orientations anisotropy switches growth, reversing trends obtained isotropic von Mises materials. Secondly, novel strategy consists including angular misalignments within range 0∘≤θ≤90∘, one direction parallel symmetry θ angle formed between other two second third axes. fact, authors’ knowledge, these first ever reported modeled anisotropic yield function prescribed misalignment and, same time, controlled be during loading. makes faces rotate twist Moreover, main contribution work identification intermediate value reaches extreme (minimum maximum), results indicate can strategically exploited control thus promote delay localization fracture metal products. conclusions research valid three materials (aluminum alloys 2090-T3, 6111-T4 6013) selected comparisons also additional criteria (CPB06ex2 Yld2011-27p).