Second‐order defeaturing estimator of manufacturing‐induced porosity on structural elasticity

Manufactured metallic components often contain nonuniformly distributed pores of complex morphologies. Since such porosity defects have a significant influence on material behaviors and affect the usage in high-performance applications, it is to understand impact characteristics components. In this work, gradient-enhanced defeaturing estimator, which allows for modeling pore geometry spatial distribution, proposed within general elastostatic framework. approach, first-order shape sensitivity implemented account change elastic quantity interests variations sizes shapes, then supplemented by second-order whose mixed partial derivative quantifies interactions between proximity. The efficacy method comes from its posterior manner that only relies field solutions reference models where are suppressed. context, meshing difficulty solution convergence issues avoided, would otherwise arise direct finite element analysis porous structures. structural performance approximated using Taylor expansion topological difference domains estimated sensitivity; variables boundaries as explicit functions design exterior formulations. Numerical results show performances influenced existence pores. pore-to-pore when close by.