FEM models for elastic parameters identification of cross laminated marittime pine panels

This paper explores the potential of Finite Element (FE) models to complement traditional static and dynamic experimental procedures aimed at elastic parameter identification in the specific case of Cross Laminated Timber (CLT). These timber products are characterized by several elastic constants due to the almost orthotropic mechanical behaviour of timber in combination with the lamination arrangement. This paper refers to an ongoing research programme investigating the possibilities of productive exploitation of a specific Sardinian Maritime Pine (Pinus Pinaster) species. With this respect, FE models have been employed in order to investigate the sensitivity of material parameters in CLT panels deformation, to check their performance with respect to widely used analytical models and to anticipate the results of experimental tests. In particular, the role of rolling shear modulus has confirmed to be a crucial property, governing the overall shear deformation response, but on the other hand being not yet easy to measure. The FE model calibration has finally showed that the investigated material presents some suitable properties for CLT; in fact, though characterized by low elastic modulus (MOE) and flexural strength, it provides a quite high value of rolling shear modulus.