6 citations · 19 across the 10 of their papers we have counts for
12 papers
Discontinuous buckling from cytoplasmic mechanics in vertex models of epithelia
Chandraniva Guha Ray, Pierre A. Haas
The cell cortex and cell adhesion contribute to the mechanics of epithelial cells and hence tissues. Vertex models of epithelia represent the cell cortex and cell adhesion, but the…
Stretching and bending of (really) thick elastic plates
Shiheng Zhao, Pierre A. Haas
The mechanical energy of an elastic plate separates into stretching and bending energies. This is a result for asymptotically thin plates, but it is often a surprisingly accurate a…
Nonlinear isotropic odd elasticity
Shiheng Zhao, Pierre A. Haas
The nonconservative elastic responses of active solids have driven a recent explosion of interest in two-dimensional "odd" elasticity: small, linear deformations of these Cauchy el…
A mechanical bifurcation constrains the evolution of cell sheet folding in the family Volvocaceae
Valens Tribet, Pierre A. Haas
The processes of morphogenesis that give rise to the shapes of organs and organisms during development are often driven by mechanical instabilities. Can such mechanical bifurcation…
Elasticity and plasticity of epithelial gap closure
Maryam Setoudeh, Pierre A. Haas
Epiboly, during which a tissue closes around the surface of the egg, pervades animal development. This epithelial gap closure involves cell intercalations at the edge of the gap. H…
Control of lumen morphology by lateral and basal cell surfaces
Chandraniva Guha Ray, Markus Mukenhirn, Alf Honigmann +1
Across development, the morphology of fluid-filled lumina enclosed by epithelial tissues arises from an interplay of lumen pressure, mechanics of the cell cortex, and cell-cell adh…
Strata of Ecological Coexistence via Grassmannians
Türkü Özlüm Çelik, Pierre A. Haas, Georgy Scholten +2
We study the Lotka--Volterra system from the perspective of computational algebraic geometry, focusing on equilibria that are both feasible and stable. These conditions stratifies…
Geometry of T1 transitions in epithelia
Pierre A. Haas
The flows of tissues of epithelial cells often involve T1 transitions. These neighbour exchanges are irreversible rearrangements crossing an energy barrier. Here, by an exact geome…
Euler buckling on curved surfaces
Shiheng Zhao, Pierre A. Haas
Euler buckling epitomises mechanical instabilities: An inextensible straight elastic line buckles under compression when the compressive force reaches a critical value .…
A model for boundary-driven tissue morphogenesis
Daniel S. Alber, Shiheng Zhao, Alexandre O. Jacinto +3
Tissue deformations during morphogenesis can be active, driven by internal processes, or passive, resulting from stresses applied at their boundaries. Here, we introduce the Drosop…
(Un)buckling mechanics of epithelial monolayers under compression
Chandraniva Guha Ray, Pierre A. Haas
When cell sheets fold during development, their apical or basal surfaces constrict and cell shapes approach the geometric singularity in which these surfaces vanish. Here, we revea…
Mechanics of poking a cyst
Shiheng Zhao, Pierre A. Haas
Indentation tests are classical tools to determine material properties. For biological samples such as cysts of cells, however, the observed force-displacement relation cannot be e…