A truss element for modelling reversible softening in living tissues
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We resort to non-linear viscoelasticity to develop a truss element able to model reversible softening in lung epithelial tissues undergoing transient stretch. Such a Maxwell truss element is built by resorting to a three-noded element whose mid-node is kinematically constrained to remain on the line connecting the end-nodes. The whole mechanical system undergoes an additive decomposition of the strains along the truss direction where the total contribution of the mid-node is accounted for by using a null-space projection and static condensation techniques. Assembling of such line-elements in 3D networks allows us to model extended regions of living tissues as well as their anisotropies.
CitationMuñoz, J. [et al.]. A truss element for modelling reversible softening in living tissues. "Mechanics research communications", 01 Abril 2013, vol. 49, p. 44-49.