Mechanical Behavior in Concrete with Recycled Glass Fiber Powder Using a Finite Element Numerical Model

Abstract Waste management and the second-life utilization of components have attracted significant interest over the past few decades. This study examines the mechanical behavior of concrete modified with recycled wind turbine blade (RWTB) powder used as a partial supplementary material. COMSOL Multiphysics was employed to simulate the response of the modified concrete under loading, using a linear elastic material model. The model investigates the initial mechanical performance and stress distribution. Key mechanical properties have been compared with available experimental literature; however, different powder properties and preparation methods are considered. The results indicate that incorporating small percentages of RWTB powder can improve certain mechanical characteristics, such as stress distribution efficiency, stiffness, and elastic strain energy capacity. The mechanical behavior as an indicative response has been presented. This trend confirms the existence of an optimal powder content that enhances structural performance. In addition, the work underscores the environmental value of integrating RWTB powder into concrete, supporting waste reduction and circular economy practices. The non-linear relationship between the related parameters has been confirmed.