The strength behavior of wood in experiment and simulations

摘要

The paper presents results of recent tests under compression, transverse tension and mixed mode stresses, based on a developed photogrammetric measuring procedure presented in [1]. The determined displacements of the measuring areas are easily transferable to a numeric simulation by a FE-Program. The strain dependent strength behavior, softening and hardening of wood transverse to the grain at loading areas with full area stress could be investigated by compression tests. These results were used to verify the simulation results, where different material models are available. Depending on the stress, the simulation model allows a more or less agreement to the experimental results. The 3-dimensional elastic-plastic material law from Grosse [2] could be applied for the simulation with good agreement. These numerical results provide interesting possibilities and they are most useful for the estimation of the load bearing behavior of wood in complex connections.