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A local damage model for anomalous high toughness of double-network gels

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Title: A local damage model for anomalous high toughness of double-network gels
Authors: Tanaka, Y. Browse this author
Issue Date: 2007
Publisher: EDP Sciences
Journal Title: Europhysics Letters
Volume: 78
Issue: 5
Start Page: 56005
Publisher DOI: 10.1209/0295-5075/78/56005
Abstract: We present a phenomenological model for anomalously high fracture energy of double-network (DN) gels, which consist of a substantially cross-linked polyelectrolyte gel (first network) and of a quite poorly cross-linked neutral polymer (second network) penetrating into the first network (Gong J. P., Katsuyama Y., Kurokawa T. and Osada Y., Adv. Mater., 15 (2003) 1155). The model assumes that the material locally softens around crack tip due to damage of the first network, and then the crack extends within the softened zone. An order estimation indicates that energy dissipation by the softening greatly exceeds the "bare fracture energy" of the softened material, and that the effective fracture energy can reach the order of 100 J/m2. This is consistent with the experimental value ~400 J/m2.
Type: article
Appears in Collections:創成研究機構 (Creative Research Institution) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田中 良巳

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