Petri P. Kärenlampi
Lectures 24
h, exercises 50 h, literature and examination 61 h
Properties.
Anisotropy. The effect of structure, moisture and temperature on properties.
Sorption, changes in dimensions, hysteresis. Diffusivity, permeability.
Thermal transitions. Composites, Strain energy
density. Strength.
Time-dependent material behavior.
The student will gain some knowledge of materials
science, especially in the case of porous, hygroscopic, anisotropic and
time-dependent materials. The student will be able to deduce and compute some
relations between structure, material properties, and structural properties.
Lectures will be given at Bor101, and streamed with
Video Conference Apparatus into Microsoft Teams. Presently, there are no
restrictions to presence in the lecture room. Any participant shall have an
opportunity to present questions and comments either in the lecture room or
within the Teams-meeting.
Exam will hopefully be on site. Please check the exam
dates proposed below. Let the lecturer know if there is any time conflict.
Lectures on Wednesdays can be joined at
Lectures on Mondays can be joined at
Grading:
Exercizes
25%
Exam 75%
Exercises
are due each Monday at 9 am, beginning January 16, to be returned to the green
metallic mailbox by main entrance of the Borealis Building. For students out of
town, exercise reports also can be delivered to the e-mail petri.karenlampi@gmail.com .
Emails sent after the due time will not be processed.
Lectures 24 hours: Monday, Wednesday
Tentative lecture schedule:
Bor101/CA106
11.1.2023 8-12 Properties; Material Properties; Stiffness,
Compliance,
Conductivity, Resistivity. Anisotropy, Periodic Variation, Composites.
16.1. 8-10 Elasticity of beams. Trivial and Nontrivial Scaling.
Strength.
Size Effect on Strength.
18.1. 8-12 Sorption, Saturation. Thermal transitions, Cell Wall
Water.
23.1. 8-10 Sorption Hysteresis
25.1. 8-12 Diffusivity, Thermal Diffusion
30.1. 8-10 Newtonian
Flow, Permeability
01.2. 8-12 Time-Temperature
- Equivalency
8.2. 10-12 Discussion of the last weekly exercise
Exercises:
Literature:
Vogel,
S., Comparative Biomechanics. Life’s Physical World. Princeton University Press
2003, pp. 1-89; 299-441. (16 h study time budgeted for an average student)
Gibson, L. J. and Ashby, M. F., Cellular solids. 2.
Ed., Cambridge University Press, 1997, pp. 1-428, 453-502. (8 h study time budgeted for an average student)
Bodig, J. and Jayne, B.: Mechanics of wood and wood composites. Van Nostrand
Reinhold Company, 1982, pp. 1-47, 176-393, 461-612. (20
h study time budgeted for an average student)
Jastrzebski, Z. D., The nature and properties of engineering
materials. John Wiley & Sons, 3. ed. 1987, pp. 1-73, 125-193, 372-423,
522-560. (16 h study time budgeted for an average
student)
Some References:
Everett,
D. H., Adsorption hysteresis. In "The solid-gas interface", (ed. E. A.
Flood) Marcel Dekker, NY, 1967, vol. 2, pp. 1055-1113.
Wallström, L., and
Lindberg, K. A. H., Distribution of added chemicals in the cell of high
temperature dried and green wood of swedish pine,
Pinus sylvestris. Wood Sci. Tech. 34(4):327-336 (2000).
Borrega, M. and
Kärenlampi, P., Mechanical behavior of heat-treated spruce (Picea
abies)wood at constant moisture content and ambient
humidity. Holz als Roh- und Werkstoff 66:63-69
(2008).
Tryding, J., A modification of the Tsai-Wu
failure criterion for the biaxial strength of paper. Tappi
77(8):132-134 (1994).
Final examination February 15,
2023, at 10-12, Room N101.
Possibility
for eventual renewals March 1, 2023, at 10-12 Room Bor101.
Lecture recordings