Fatigue-Resistant elastomers

Chenghai Li; Hang Yang; Zhigang Suo; Jingda Tang

doi:10.1016/j.jmps.2019.103751

Fatigue-Resistant elastomers

Chenghai Li
, Hang Yang
, Zhigang Suo
, Jingda Tang

School of Aerospace Engineering

Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

109 Scopus citations

Abstract

The resistance of a material to the growth of a crack is characterized by fracture toughness under monotonic load, and by fatigue threshold under cyclic load. The fatigue threshold of engineering elastomers is commonly limited to ∼50 J/m², much below their toughness (10³∼10⁵ J/m²). Here we report fatigue-resistant elastomers with threshold beyond 500 J/m². Such an elastomer is a composite of two elastomers: a lattice of a hard elastomer embedded in a matrix of soft elastomer. Both the hard and soft elastomers are elastically stretchable, with small hysteresis. At a crack front in the composite, the soft matrix shears greatly, which de-concentrates stress in the hard lattice. When the crack advances in the composite, the energy dissipated scales with the feature size of the lattice. By contrast, when a crack advances in a homogeneous elastomer, the energy dissipated scales with the mesh size of the polymer network. The fatigue-resistant elastomers open new opportunities for applications requiring stretchable materials.

Original language	English
Article number	103751
Journal	Journal of the Mechanics and Physics of Solids
Volume	134
DOIs	https://doi.org/10.1016/j.jmps.2019.103751
State	Published - Jan 2020

Keywords

3D printing
Composites
Elastomer
Fatigue-resistant
Threshold

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10.1016/j.jmps.2019.103751

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title = "Fatigue-Resistant elastomers",

abstract = "The resistance of a material to the growth of a crack is characterized by fracture toughness under monotonic load, and by fatigue threshold under cyclic load. The fatigue threshold of engineering elastomers is commonly limited to ∼50 J/m2, much below their toughness (103∼105 J/m2). Here we report fatigue-resistant elastomers with threshold beyond 500 J/m2. Such an elastomer is a composite of two elastomers: a lattice of a hard elastomer embedded in a matrix of soft elastomer. Both the hard and soft elastomers are elastically stretchable, with small hysteresis. At a crack front in the composite, the soft matrix shears greatly, which de-concentrates stress in the hard lattice. When the crack advances in the composite, the energy dissipated scales with the feature size of the lattice. By contrast, when a crack advances in a homogeneous elastomer, the energy dissipated scales with the mesh size of the polymer network. The fatigue-resistant elastomers open new opportunities for applications requiring stretchable materials.",

keywords = "3D printing, Composites, Elastomer, Fatigue-resistant, Threshold",

author = "Chenghai Li and Hang Yang and Zhigang Suo and Jingda Tang",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

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doi = "10.1016/j.jmps.2019.103751",

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journal = "Journal of the Mechanics and Physics of Solids",

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T1 - Fatigue-Resistant elastomers

AU - Li, Chenghai

AU - Yang, Hang

AU - Suo, Zhigang

AU - Tang, Jingda

PY - 2020/1

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N2 - The resistance of a material to the growth of a crack is characterized by fracture toughness under monotonic load, and by fatigue threshold under cyclic load. The fatigue threshold of engineering elastomers is commonly limited to ∼50 J/m2, much below their toughness (103∼105 J/m2). Here we report fatigue-resistant elastomers with threshold beyond 500 J/m2. Such an elastomer is a composite of two elastomers: a lattice of a hard elastomer embedded in a matrix of soft elastomer. Both the hard and soft elastomers are elastically stretchable, with small hysteresis. At a crack front in the composite, the soft matrix shears greatly, which de-concentrates stress in the hard lattice. When the crack advances in the composite, the energy dissipated scales with the feature size of the lattice. By contrast, when a crack advances in a homogeneous elastomer, the energy dissipated scales with the mesh size of the polymer network. The fatigue-resistant elastomers open new opportunities for applications requiring stretchable materials.

AB - The resistance of a material to the growth of a crack is characterized by fracture toughness under monotonic load, and by fatigue threshold under cyclic load. The fatigue threshold of engineering elastomers is commonly limited to ∼50 J/m2, much below their toughness (103∼105 J/m2). Here we report fatigue-resistant elastomers with threshold beyond 500 J/m2. Such an elastomer is a composite of two elastomers: a lattice of a hard elastomer embedded in a matrix of soft elastomer. Both the hard and soft elastomers are elastically stretchable, with small hysteresis. At a crack front in the composite, the soft matrix shears greatly, which de-concentrates stress in the hard lattice. When the crack advances in the composite, the energy dissipated scales with the feature size of the lattice. By contrast, when a crack advances in a homogeneous elastomer, the energy dissipated scales with the mesh size of the polymer network. The fatigue-resistant elastomers open new opportunities for applications requiring stretchable materials.

KW - 3D printing

KW - Composites

KW - Elastomer

KW - Fatigue-resistant

KW - Threshold

UR - https://www.scopus.com/pages/publications/85073035266

U2 - 10.1016/j.jmps.2019.103751

DO - 10.1016/j.jmps.2019.103751

M3 - 文章

AN - SCOPUS:85073035266

SN - 0022-5096

VL - 134

JO - Journal of the Mechanics and Physics of Solids

JF - Journal of the Mechanics and Physics of Solids

M1 - 103751

ER -

Fatigue-Resistant elastomers

Abstract

Keywords

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