Finite element simulation of mechanical behavior in concrete with recycled wind turbine blade powder

Recycled wind turbine blades and their second-life applications present significant challenges. This study investigates the mechanical behavior of concrete incorporating recycled wind turbine blade (RWTB) powder as a partial supplementary material. COMSOL Multiphysics simulations, using a linear elastic material model, were performed to evaluate stress distribution, deformation, and elastic strain energy density. The results indicate that small amounts of RWTB powder improve stress distribution and energy absorption, whereas higher replacement ratios reduce performance. The simulation findings identify optimal powder content. Numerical results showed that RWTB powder enhanced compressive strength by 3.25% and 4.0% at 5% and 10% replacement ratios, respectively. Beyond 15%, strength decreased significantly, with reductions of 18% and 44% observed at 30% and 40% replacement ratios. These findings highlight the environmental benefits of integrating RWTB powder into concrete were highlighted, supporting waste reduction and circular-economy practices.