Fracture of a biopolymer gel as a viscoplastic disentanglement process
arXiv:cond-mat/0607113 · doi:10.1140/epje/i2006-10048-6
Abstract
We present an extensive experimental study of mode-I, steady, slow crack dynamics in gelatin gels. Taking advantage of the sensitivity of the elastic stiffness to gel composition and history we confirm and extend the model for fracture of physical hydrogels which we proposed in a previous paper (Nature Materials, doi:10.1038/nmat1666 (2006)), which attributes decohesion to the viscoplastic pull-out of the network-constituting chains. So, we propose that, in contrast with chemically cross-linked ones, reversible gels fracture without chain scission.
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- From thermally activated to viscosity controlled fracture of biopolymer hydrogels
- Mode I fracture of a biopolymer gel: rate-dependent dissipation and large deformations disentangled
- Crack initiation in viscoelastic materials
- Crack tip kinematics reveal the cohesive zone structure in brittle hydrogel fracture
- Fingering to fracturing transition in a transient gel
- Role of normal stress in the creep dynamics and failure of a biopolymer gel
- Stationary crack propagation in a two-dimensional visco-elastic network model
- Effect of Random Fiber Network and Fracture Toughness on the Onset of Cavitation in Soft Materials
- Flow and fracture near the sol-gel transition of silica nanoparticle suspensions