The project focusses on the behavior of clear wood, in particular under compression in the fiber direction. Extensive experimental investigations show that under compression wood develops kinkbands whose angle is constant with respect to the fibers and that the kindband width increases with the overall compression, much like the behavior of kindbands in fiber reinforced ipoxy. A set of approximate formulas that describe the load-displacement from the initial linear part over the paek to the final steady-state has been established. A more detailed investigation modeling the fibers and the "matrix" as beams has been carried out. The foundation for models based on advanced continuum mechanics theories that employ notions of micropolarity and nonlocality has been set up, while implementation in finite element programs is in progress.
|Effective start/end date||01/01/1993 → 31/12/1997|
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