Synergy between the crack pattern and substrate elasticity in colloidal deposits - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review E Année : 2021

Synergy between the crack pattern and substrate elasticity in colloidal deposits

Résumé

Desiccation cracks in colloidal deposits occur to release the excess strain energy arising from the competition between the drying induced shrinkage of the deposit and its adhesion to the substrate. Here we report remarkably different morphology of desiccation cracks in the dried patterns formed by the evaporation of sessile drops containing colloids on elastomer (soft) or glass (stiff) substrates. The change in the crack pattern, i.e., from radial cracks on stiff substrates to circular cracks on soft substrates, is shown to arise solely due to the variation in elasticity of the underlying substrates. Our experiments and calculations reveal an intricate correlation between the desiccation crack patterns and the substrate's elasticity. The mismatch in modulus of elasticity between the substrate and that of the particulate deposit significantly alters the energy release rate during the nucleation and propagation of cracks. The stark variation in crack morphology is attributed to the tensile or compressive nature of the drying-induced in-plane stresses.
Fichier principal
Vignette du fichier
Hisay_etal_PRE_2021-final.pdf (6.18 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03294506 , version 1 (08-11-2021)

Identifiants

Citer

Hisay Lama, Tonmoy Gogoi, Madivala Basavaraj, Ludovic Pauchard, Dillip Satapathy. Synergy between the crack pattern and substrate elasticity in colloidal deposits. Physical Review E , 2021, 103 (3), pp.032602. ⟨10.1103/PhysRevE.103.032602⟩. ⟨hal-03294506⟩
39 Consultations
41 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More