Finite element simulation of swelling-induced crack healing in gels

Finite element simulation of swelling-induced crack healing in gels

Finite element simulations have been conducted to study the evolution of stress fields at the crack tip and the crack opening around the crack tip with time for a gel subject to mode I loading. It is found that the stress singularity at the crack tip is eliminated by the swelling of the gel when the...

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Veröffentlicht in:Soft matter 2012-01, Vol.8 (31), p.817-8112
Hauptverfasser: Zhang, Jiaping, An, Yonghao, Yazzie, Kyle, Chawla, Nikhilesh, Jiang, Hanqing
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container_end_page 8112
container_issue 31
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container_title Soft matter
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creator Zhang, Jiaping
An, Yonghao
Yazzie, Kyle
Chawla, Nikhilesh
Jiang, Hanqing
description Finite element simulations have been conducted to study the evolution of stress fields at the crack tip and the crack opening around the crack tip with time for a gel subject to mode I loading. It is found that the stress singularity at the crack tip is eliminated by the swelling of the gel when the solvent is applied at the crack tip. The swelling of the gel also heals the crack tip and the new crack tip generated by swelling does not have a stress singularity. This crack healing process is also verified by experiments and the strain field is measured by digital image correlation. This crack healing mechanism seems to provide a useful means to improve the mechanical integrity of gels and self-healing in general. Finite element simulations have been conducted to study the healing of the crack tip due to the swelling of the gel. This cracking healing process is also verified by experiments.
doi_str_mv 10.1039/c2sm25399b
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title Finite element simulation of swelling-induced crack healing in gels
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