|Course title: ||Physical and Mechanical Properties of Wood|
|Semester: ||WS 2019/2020|
|Course supervisor: ||Ing. Václav Sebera, Ph.D.|
|Supervising department: ||Department of Wood Science and Technology (FFWT)|
|Time allowance: ||full-time, 2/1 (hours of lectures per week / hours of seminars per week)|
|Prerequisites for registration: ||State Bachelor Examination|
|Type of study: ||usual|
|Form of teaching: ||lecture, seminar|
|Mode of completion and credits: ||Exam (4 credits)|
|Course objective: |
|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 content: |
|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.
|Teaching methods and workload (hours of workload): |
|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|
|Key words: |
|Course completion: |
|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).
|Course methods: ||The course is divided into lectures (theoretical knowledge), training (practical skills) and field exercise (application of knowledge and skills in practice). Participation in all forms of training is required. Students for the exam process essay focused either on theoretical analysis of the problem or case study.|
|Reading list: |
| Composite Materials: Mechanical Behavior and Structural Analysis. New York: Springer Verlag, 1998. 645 p. ISBN 0-387-98426-7.|
|BODIG, J. -- JAYNE, B A. Mechanics of Wood and Wood Composites. Malabar: Krieger Publish.Comp., 1993. 21 p. ISBN 0-89464-777-6.|
|BUCUR, V. Acoustics of Wood. Boca Raton: CRC Press, 1995. 284 p. ISBN 0-8493-4801-3.|
|BUCUR, V. Nondestructive characterization and imaging of wood. Berlin: Springer, 2003. 354 p. Springer series in wood science ;. ISBN 3-540-43840-8.|
| Transport Processes in Wood. Berlin: Springer-Verlag, 1984. 245 p. ISBN 3-504-12574-4.|
| Wood: Influences of moisture on physical properties. Virginia: Virg.Polytech.Institute&State University, 1995. 227 p. ISBN 0-9622181-0-3.|
| Wood-Water Relations. Berlin: Springer-Verlag, 1988. 283 p. ISBN 3-540-19258-1.|
|TORGOVNIKOV, G. Dielectric Properties of Wood and Wood-Based Materials. Berli: Springer-Verlag, 1993. 196 p. Springer Series in Wood Science. ISBN 3-540-55394-0.|
|Study plans: |
|-- item not defined --|
|Run in the period of: ||WS 2018/2019, WS 2017/2018, WS 2016/2017, WS 2015/2016, WS 2014/2015, WS 2013/2014 (and older)|
|Course tutor: ||Ing. Martin Brabec, Ph.D. (examiner, instructor, tutor)|
Ing. Luděk Praus, Ph.D. (examiner, instructor, lecturer, tutor)
Ing. Václav Sebera, Ph.D. (examiner, instructor, lecturer, supervisor, tutor)
Ing. Jan Tippner, Ph.D. (examiner, instructor, lecturer, tutor)
|Teaching language: ||English|