Computational up-scaling of anisotropic swelling and mechanical behavior of hierarchical cellular materials

Ahmad Rafsanjani*, Dominique Derome, Falk K. Wittel, Jan Carmeliet

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

The hygro-mechanical behavior of a hierarchical cellular material, i.e. growth rings of softwood is investigated using a two-scale micro-mechanics model based on a computational homogenization technique. The lower scale considers the individual wood cells of varying geometry and dimensions. Honeycomb unit cells with periodic boundary conditions are utilized to calculate the mechanical properties and swelling coefficients of wood cells. Using the cellular scale results, the anisotropy in mechanical and swelling behavior of a growth ring in transverse directions is investigated. Predicted results are found to be comparable to experimental data. It is found that the orthotropic swelling properties of the cell wall in thin-walled earlywood cells produce anisotropic swelling behavior while, in thick latewood cells, this anisotropy vanishes. The proposed approach provides the ability to consider the complex microstructure when predicting the effective mechanical and swelling properties of softwood.

OriginalsprogEngelsk
TidsskriftComposites Science and Technology
Vol/bind72
Udgave nummer6
Sider (fra-til)744-751
ISSN0266-3538
DOI
StatusUdgivet - 27. mar. 2012
Udgivet eksterntJa

Fingeraftryk Dyk ned i forskningsemnerne om 'Computational up-scaling of anisotropic swelling and mechanical behavior of hierarchical cellular materials'. Sammen danner de et unikt fingeraftryk.

Citationsformater