Petri P. Kärenlampi
Lectures 30 h, exercises 70 h, literature 12 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. Kubelka-Munk Optics.
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 26 hours:
Monday, Tuesday
Grading:
Exercizes 25%
Exam 75%
Exercises
are due each Monday at 9 am, between September 19 and October
17, to be returned to the Lecturer’s mailbox by the Southern entrance of
the Borealis Building.
Tentative lecture schedule:
12.9. 8-10, Bor101, Video1 Properties; Material Properties; Stiffness, Compliance, Conductivity, Resistivity
14.9. 8-12, Bor101, Video1 Anisotropy, Periodic Variation, Composites
Strain Energy Density, Strength. Rigidity inTension, Twisting and Bending
19.9. 8-10, Bor101, Video1 Mass Density Effects, Dimensionality, Percolation, Connectivity
21.9. 8-12, Bor101, Video1 Size Effect on Strength
Sorption, Shrinkage and Expansion
26.9. 8-10, Bor101, Video1 Sorption Hysteresis
28.9. 8-12, Bor101, Video1 Thermal transitions
Cell Wall Water
3.10. 8-10, Bor101, Video1 Diffusivity, Thermal Diffusion
6.10. 8-12, Bor101, Video1 Newtonian Flow, Permeability
10.10. 8-10, Bor101, Video1 Time-Temperature-Moisture-Specific Volume – Equivalency
12.10. 8-12, Bor101, Video1 Kubelka-Munk Optics
Exercises:
Last exercise reporting session Wednesday, October 19, 8-10 at room Bor101.
Literature:
Vogel, S., Comparative Biomechanics. Life’s Physical World. Princeton University Press 2003, pp. 1-89; 299-441. (30 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. (20 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. (40 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. (30 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 October 26, 2011 at 16-18, Room Bor101, Canthia Video1.
Possibility for eventual renewals November 9, 2011 at 16-18, Room Bor101, Canthia Video1.