The Effect of Hygroscopic Design Parameters on the Programmability of Laminated Wood Composites for Adaptive Façades
Typical adaptive façades respond to external conditions to enhance indoor spaces based on complex mechanical actuators and programmable functions. Hygroscopic embedded properties of wood, as low-cost low-tech programmable material, have been utilized to induce passive motion mechanisms. Wood as anisotropic material allows for different passive programmable motion configurations that relies on several hygroscopic design parameters. This paper explores the effect of these parameters on programmability of laminated wood composites through physical experiments in controlled humidity environment. The paper studies variety of laminated configurations involving different grain orientations, and their effect on maximum angle of deflection and its durability. Angle of deflection is measured using image analysis software that is used for continuous tracking of deflection in relation to time. Durability is studied as the number of complete programmable cycles that wood could withstand before reaching point of failure. Results revealed that samples with highest deflection angle have least programmability durability.
KeywordsWood Hygroscopic design Lamination Deflection Durability Adaptive façades
The authors are grateful to the Bartlett Fund for Science and Engineering Research Collaboration in supporting the ‘Soft Adaptive Building Skins for Energy-Efficient Architecture’ research project.
- 2.Krieg, O.D., et al.: HygroSkin – Meteorosensitive pavilion. In: Fabricate 2014, pp. 61–67. Zurich (2014)Google Scholar
- 8.Abdelmohsen, S., Massoud, P., El-Dabaa, R., Ibrahim, A., Mokbel, T.: A computational method for tracking the hygroscopic motion of wood to develop adaptive architectural skins. In: eCAADe 2018: 6th Annual Conference on Education and Research in Computer Aided Architectural Design in Europe, Poland, vol. 2, pp. 1–9 (2018)Google Scholar
- 9.El-Dabaa, R., Abdelmohsen, S.: A Methodology for Evaluating the Hygroscopic Behavior of Wood in Adaptive Building Skins using Motion Grammar, vol. 362, pp. 1–8 (2018)Google Scholar