Impact resistance of birch plywood sheets - experimental and numerical approaches

This study presents both experimental tests and numerical analyses to predict the dynamic structural behavior of birch plywood sheets under impact conditions. The comparison between the ballistic curves and ballistic limits obtained numerically and experimentally highlights the accuracy of the model in simulating the material response. Birch plywood, with its multilayer cross-laminated structure, demonstrates excellent impact resistance, effectively distributing and dissipating the applied forces. This configuration significantly reduces crack propagation and enhances energy absorption, making it a robust material for dynamic loading conditions. The paper introduces a detailed model for the ply fabric material of birch plywood, along with a comprehensive set of material parameters, providing a solid foundation for further research and application. The numerical analysis of the average impact force across the range of impact velocities considered offers valuable insights into the material performance. These findings further validate the suitability of birch plywood for structural applications requiring impact resistance. This work contributes to a deeper understanding of the material dynamic behavior and advances the knowledge of engineered wood products in impact-related contexts, paving the way for more informed decisions in material selection for demanding structural applications.