Crack Initiation in Viscoelastic Materials

Crack Initiation in Viscoelastic Materials

In viscoelastic materials, individually short-lived bonds collectively result in a mechanical resistance which is long lived but finite as, ultimately, cracks appear. Here, we provide a microscopic mechanism by which a critical crack length emerges from the nonlinear local bond dynamics. Because of...

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Veröffentlicht in:Physical review letters 2018-06, Vol.120 (26), p.268002-268002, Article 268002
Hauptverfasser: Mulla, Yuval, Oliveri, Giorgio, Overvelde, Johannes T B, Koenderink, Gijsje H
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Sprache:eng
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Crack initiation
Dependence
Fracture mechanics
Mathematical models
Viscoelastic materials
Viscoelasticity
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container_issue 26
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container_title Physical review letters
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creator Mulla, Yuval
Oliveri, Giorgio
Overvelde, Johannes T B
Koenderink, Gijsje H
description In viscoelastic materials, individually short-lived bonds collectively result in a mechanical resistance which is long lived but finite as, ultimately, cracks appear. Here, we provide a microscopic mechanism by which a critical crack length emerges from the nonlinear local bond dynamics. Because of this emerging length scale, macroscopic viscoelastic materials fracture in a fundamentally different manner from microscopically small systems considered in previous models. We provide and numerically verify analytical equations for the dependence of the critical crack length on the bond kinetics and applied stress.
doi_str_mv 10.1103/PhysRevLett.120.268002
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source American Physical Society Journals; EZB-FREE-00999 freely available EZB journals
subjects Crack initiation
Dependence
Fracture mechanics
Mathematical models
Viscoelastic materials
Viscoelasticity
title Crack Initiation in Viscoelastic Materials
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