This session focuses on the use of computational techniques to better understand the mechanical behavior of wood and bio-based structural materials. The underlying mechanics of such materials is characterized by a rather complex nonlinear behavior that involves anisotropy, viscoelasticity, elasto-plasticity, damage, etc., which can get even more complex under environmental influences such as due to moisture and temperature variations [1]. Mainly simplified material models are used/replaced for simulations to describe the behavior of these materials. However, the models need to sufficiently cover the relevant phenomena for efficient simulation/optimization to support design decisions [2]. Therefore, this session aims to discuss recent advances in computational mechanics of wood and biocomposites and their engineering applications, focusing on modeling methodologies. Topics of interest for this session are: • Time-dependent static, quasi-static and dynamic analysis • Stochastic modelling and optimization • Development of new material models • Model order reduction and computational efficiency • Damage and failure • Validation and verification of the numerical problems REFERENCES [1] Yu T., Khaloian A., van de Kuilen J.W.G. (2022). An improved model for the time-dependent material response of wood under mechanical loading and varying humidity conditions. Eng. Struct., 259: 114116. https://doi.org/10.1016/j.engstruct.2022.114116 [2] Lukacevic, M., Füssl, J., Pech, S., Vida, C., and Eberhardsteiner, J. (2021). Computational mechanics concepts for wood-based products and timber structural elements. WCTE 2021: World Conference on Timber Engineering. Santiago, Chile. DOI=10.34726/1341.