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.
Due to
the present restrictions, the course will start as a distance learning event.
Lectures will be given at Bor101, and streamed with
Video Conference Apparatus into Microsoft Teams. Any participant shall have an
opportunity to present questions and comments within the Teams-meeting.
Depending
on eventual changes in restrictions an opportunity to enter the lecture room
may or may not appear during the course. 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 Mondays can be joined at
Lectures
on Wednesdays can be joined at
Discussion
of the last weekly exercise can be joined at
Grading:
Exercizes 25%
Exam 75%
Exercises
are due each Monday at 9 am, beginning January 17, to be returned to the green
metallic mailbox by main entrance of the Borealis Building. Due to the
pandemic, 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
10.1.2022
8-10
Properties;
Material Properties; Stiffness, Compliance,
Conductivity, Resistivity
12.1. 8-12 Anisotropy,
Periodic Variation, Composites, Strength.
Trivial and Nontrivial Scaling.
17.1. 8-10 Size Effect on
Strength, Sorption, Saturation
19.1. 8-1 Thermal transitions, Cell Wall Water
24.1. 8-10 Sorption Hysteresis
26.1. 8-12 Diffusivity, Thermal Diffusion
31.1. 8-10 Newtonian Flow, Permeability
02.2.
8-12 Time-Temperature - Equivalency
9.2. 13-14 Discussion of the last
weekly exercise
Exercises:
Last exercise reporting session Wednesday, February
9, 13-14 at Bor101/CA106.
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, 2022, at 10-12, Room F100.
Possibility for eventual renewals February 28, 2022, at 14-16 Room N100.
Lecture recordings