Fracture energy of gels

Details Fracture energy of gels Fracture energy of gels

2000-03-29

arxiv.org/abs/cond-mat/0003474v2

Euro.Phys.J.E3 (2000) 395-401

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 8 figures. Some errors in the first version have been corrected

Scientific paper

10.1007/s101890070010

To clarify effects of crack speed and cross-link density on fracture energy of acrylamide gels, we evaluated the roughness of the fracture surface and measured the fracture energy taking into account the roughness. The fracture energy increases linearly with crack speed $V$ in a fast crack speed region, and the increasing rate of fracture energy with $V$ decreases with increasing cross link density in the gels. In a slow crack speed region the fracture energy depends on crack speed more strongly than in the fast crack speed region. This indicates that a qualitative change exists in fracture process of the gels.

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