|Course code: ||PMEF|
|Course title in language of instruction: ||Physical and Mechanical Properties of Wood|
|Course title in Czech: ||Physical and Mechanical Properties of Wood|
|Course title in English: ||Physical and Mechanical Properties of Wood|
|Mode of completion and number of credits: ||Exam (4 credits)|
(1 ECTS credit = 28 hours of workload)
|Mode of delivery/Timetabled classes: ||full-time, 2/1 (hours of lectures per week / hours of seminars per week)|
|Language of instruction: ||English|
|Level of course: ||master|
|Semester: ||WS 2019/2020|
|Name of lecturer: ||Ing. Václav Sebera, Ph.D. (supervisor)|
|Prerequisites: ||State Bachelor Examination|
|Aims of the course: |
|Knowledge of the properties of wood and wood-based materials for using in wood construction, furniture and for other wood products. Learning the fundamentals of materials engineering - understanding the relationship between chemical composition, anatomical structure and properties of wood.|
|Course contents: |
|1.||Physical properties of wood. (allowance 0/2)|
|a.||The nature of wood and wood products. Fundamental properties of softwoods and hardwoods.|
Elementary wood structure -- macroscopic and microscopic characteristics of wood.
Density and specific gravity:
Basic wood -- moisture, density, and temperature, relationships. Specific gravity, moisture content, hygroscopicity, dimensional changes due to changing moisture content.
|b.||Water and wood. Wood ultrastructure. Moisture movements in wood. Woos drying and dimensional changes.|
Thermal conductivity and moisture diffusion:
Coupled mass and heat transfer.
|c.||Thermal properties of wood - heat capacity, heat transfer, heat and thermal conductivity.|
Acoustic properties of wood - wood sound propagation, sound damping, resonant properties of wood, building acoustics.
Electrical and magnetic properties of wood - conductivity, dielectric strength properties. Optical properties of wood.
|2.||Mechanical properties of wood. (allowance 0/2)|
|a.||Strength of wood. Lumber and composite products.|
Introduction. Mechanics of deformable body. Stress and strain tensors, transformation of stress and deformation components. Equilibrium equation. Simple stress-strain systems -- uniaxial and shear stress, stress-strain curve. Mohr's circle.
|b.||Hooke's law. Application of the theory of elasticity on simple states of stress - wood strength in pressure, tension, bending, shear and torsion. |
Determination of mechanical properties.
|c.||Rheology of wood - wood creep, the effect of stress time, permanent strength. Plasticity of wood, viscosity. Stiffness of wood.|
Factors influencing the physical and mechanical properties of wood. Evaluation of quality wood. Modification of wood properties. Durability and resistance.
Destructive and nondestructive testing. Numerical simulation of physical fields.
|Learning outcomes and competences: |
|-||Ability to apply knowledge |
|-||Ability to create new ideas (creativity)|
|-||Ability to make decisions|
|-||Ability to solve problems|
|-||Ability to work in international context|
|-||Ability to work independently|
|-||Capacity to learn|
|-||Communication in second language |
|-||Science and research skills|
|-||Skilled at utilizing and processing information|
|-||Spirit of enterprise|
|-||Ability of laboratory analysis and their interpretation|
|-||Ability to determine reasons of wood response|
|-||Ability to identify base properties of wood|
|-||Knowledge of the kind of materials based on wood, their properties and using|
|-||Master mathematical tools necessary for solving real world problems.|
|Type of course unit: ||optional|
|Year of study: ||Not applicable - the subject could be chosen at anytime during the course of the programme.|
|Work placement: ||There is no compulsory work placement in the course unit.|
|Recommended study modules: ||-|
|Learning activities and study load (hours of study load): |
|Type of teaching method||Daily attendance|
| practice||10 h|
| seminar||2 h|
| laboratory work||10 h|
| consultation||1 h|
| project work||2 h|
| public presentation (oral)||2 h|
| preparation for regular assessment||10 h|
| preparation of presentation||10 h|
| elaboration of reports||15 h|
| writing of seminar paper||50 h|
|Assessment methods: |
|Credit (reports of 10 exercises ranked 0-1, seminar worked rated 0-5, presentations rated 0-5, a minimum total of 13 points, test 20 questions)|
Test (solution of problems using available tools, oral exam of four topics - preparation in written form, verbal response).
|Recommended reading: |
|RQ||Composite Materials: Mechanical Behavior and Structural Analysis||New York||Springer Verlag||1998||0-387-98426-7|
|RQ||BODIG, J. -- JAYNE, B A.||Mechanics of Wood and Wood Composites||Malabar||Krieger Publish.Comp.||1993||0-89464-777-6|
|RQ||BUCUR, V.||Acoustics of Wood||Boca Raton||CRC Press||1995||0-8493-4801-3|
|RQ||BUCUR, V.||Nondestructive characterization and imaging of wood||Berlin||Springer||2003||3-540-43840-8|
|RQ||Transport Processes in Wood||Berlin||Springer-Verlag||1984||3-504-12574-4|
|RQ||Wood: Influences of moisture on physical properties||Virginia||Virg.Polytech.Institute&State University||1995||0-9622181-0-3|
|RQ||TORGOVNIKOV, G.||Dielectric Properties of Wood and Wood-Based Materials||Berli||Springer-Verlag||1993||3-540-55394-0|