Wood as an Engineering Material

LE202

Wood Science and Technology

Lecturer: Aleš Straže

1. semester

Lectures 35 hours

Seminars 5

Seminar tutorials

Laboratory tutorials 35

Field work

Other work

Credit points 6 cp

Wood - an environmentally friendly material.
Wood as hetero-capillary system with a typical composite structure at the macromolecular, submicroscopic, microscopic and macroscopic level.
Density, porosity, and wood moisture content; phase equilibrium and phase changes.
Sorption thermodynamics: enthalpy, entropy and Gibbs free enthalpy (energy) of free and bound water, wetting and heat of sorption (differential and integral); hydro expansion (swelling) pressure.
Hydro expansion – hydro elastic effect and stress states.
Thermal, electrical and acoustical characteristics of the wood - non-destructive study of wood structures and properties.
Elasto mechanic properties of wood as an orthotropic material.
Visco-elasticity of wood and stress relaxation in thermo-mechanical processes.
Fracture mechanics of wood; linear elastic fracture mechanics (LEFM), Numerical and experimental characterization methods of wood.
Strength of wood - a hierarchical structure of wood and characterization of mechanical properties, criteria for assessing the strength of timber - Methods for ultimate limit states and serviceability EC 5.
Evaluation of the relevant properties of wood; variability of physical and mechanical properties of wood (in the tree, between trees, juvenile, adult wood, reaction wood).

1. Entry in the corresponding year of the study programme.

2.
- Attendance at exercises and written report,
- colloquium from tutorials.