Self-healing of fatigue damage in cross-ply glass/epoxy laminates

Sang Yup Kim; Nancy R. Sottos; Scott R. White

doi:10.1016/j.compscitech.2019.03.016

Self-healing of fatigue damage in cross-ply glass/epoxy laminates

Sang Yup Kim, Nancy R. Sottos, Scott R. White

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

Abstract

Self-healing of fatigue damage is reported in laminated composites fabricated from unidirectional glass/epoxy prepreg with embedded microcapsules. Microcapsules (ca. 2.5 μm) containing a mixture of ethyl phenylacetate (EPA) solvent and diglycidyl ether of bisphenol A (DGEBA) epoxy are seamlessly incorporated into cross-ply [(0/90 ₃ ) ₄ /0] _T laminated composites. Specimens subjected to tension-tension fatigue testing followed by a 24 h rest period at ambient conditions recover 52% of the initial Young's modulus as a result of self-healing. Fluorescent labeling of microcapsules and matrix resin combined with confocal fluorescent imaging reveals that the healing agents wick into transverse fatigue cracks, ultimately rebonding the crack faces after self-healing. Furthermore, self-healing composite laminates exhibit a higher resistance to crack growth as a result of the presence of the embedded microcapsules. The fatigue behavior of laminated self-healing composites demonstrates the potential for extended fatigue life of fiber-reinforced polymer composites for structural applications.

Original language	English (US)
Pages (from-to)	122-127
Number of pages	6
Journal	Composites Science and Technology
Volume	175
DOIs	https://doi.org/10.1016/j.compscitech.2019.03.016
State	Published - May 3 2019

Keywords

A
B
C
Elastic properties
Fatigue
Functional composites
PMCs
Transverse cracking

ASJC Scopus subject areas

Ceramics and Composites
Engineering(all)

Online availability

10.1016/j.compscitech.2019.03.016

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title = "Self-healing of fatigue damage in cross-ply glass/epoxy laminates",

abstract = " Self-healing of fatigue damage is reported in laminated composites fabricated from unidirectional glass/epoxy prepreg with embedded microcapsules. Microcapsules (ca. 2.5 μm) containing a mixture of ethyl phenylacetate (EPA) solvent and diglycidyl ether of bisphenol A (DGEBA) epoxy are seamlessly incorporated into cross-ply [(0/90 3 ) 4 /0] T laminated composites. Specimens subjected to tension-tension fatigue testing followed by a 24 h rest period at ambient conditions recover 52% of the initial Young's modulus as a result of self-healing. Fluorescent labeling of microcapsules and matrix resin combined with confocal fluorescent imaging reveals that the healing agents wick into transverse fatigue cracks, ultimately rebonding the crack faces after self-healing. Furthermore, self-healing composite laminates exhibit a higher resistance to crack growth as a result of the presence of the embedded microcapsules. The fatigue behavior of laminated self-healing composites demonstrates the potential for extended fatigue life of fiber-reinforced polymer composites for structural applications.",

keywords = "A, B, C, Elastic properties, Fatigue, Functional composites, PMCs, Transverse cracking",

author = "Kim, {Sang Yup} and Sottos, {Nancy R.} and White, {Scott R.}",

note = "Funding Information: This work was funded by the US Air Force Office of Scientific Research , Center of Excellence for Self-Healing, Regeneration and Structural Remodeling (Grants No. FA9550-15-1-0028 and FA9550-16-1-0017 ). The authors would like to acknowledge G. Horn from the Advanced Materials Testing and Evaluation Laboratory at the University of Illinois Urbana-Champaign for the help with the testing frame. Also, the authors would like to thank Dr. David Farrow, Dr. Henghua Jin, and Dr. Amanda R. Jones for helpful discussions. Funding Information: This work was funded by the US Air Force Office of Scientific Research, Center of Excellence for Self-Healing, Regeneration and Structural Remodeling (Grants No. FA9550-15-1-0028 and FA9550-16-1-0017). The authors would like to acknowledge G. Horn from the Advanced Materials Testing and Evaluation Laboratory at the University of Illinois Urbana-Champaign for the help with the testing frame. Also, the authors would like to thank Dr. David Farrow, Dr. Henghua Jin, and Dr. Amanda R. Jones for helpful discussions. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = may,

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doi = "10.1016/j.compscitech.2019.03.016",

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AU - Kim, Sang Yup

AU - Sottos, Nancy R.

AU - White, Scott R.

N1 - Funding Information: This work was funded by the US Air Force Office of Scientific Research , Center of Excellence for Self-Healing, Regeneration and Structural Remodeling (Grants No. FA9550-15-1-0028 and FA9550-16-1-0017 ). The authors would like to acknowledge G. Horn from the Advanced Materials Testing and Evaluation Laboratory at the University of Illinois Urbana-Champaign for the help with the testing frame. Also, the authors would like to thank Dr. David Farrow, Dr. Henghua Jin, and Dr. Amanda R. Jones for helpful discussions. Funding Information: This work was funded by the US Air Force Office of Scientific Research, Center of Excellence for Self-Healing, Regeneration and Structural Remodeling (Grants No. FA9550-15-1-0028 and FA9550-16-1-0017). The authors would like to acknowledge G. Horn from the Advanced Materials Testing and Evaluation Laboratory at the University of Illinois Urbana-Champaign for the help with the testing frame. Also, the authors would like to thank Dr. David Farrow, Dr. Henghua Jin, and Dr. Amanda R. Jones for helpful discussions. Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/5/3

Y1 - 2019/5/3

N2 - Self-healing of fatigue damage is reported in laminated composites fabricated from unidirectional glass/epoxy prepreg with embedded microcapsules. Microcapsules (ca. 2.5 μm) containing a mixture of ethyl phenylacetate (EPA) solvent and diglycidyl ether of bisphenol A (DGEBA) epoxy are seamlessly incorporated into cross-ply [(0/90 3 ) 4 /0] T laminated composites. Specimens subjected to tension-tension fatigue testing followed by a 24 h rest period at ambient conditions recover 52% of the initial Young's modulus as a result of self-healing. Fluorescent labeling of microcapsules and matrix resin combined with confocal fluorescent imaging reveals that the healing agents wick into transverse fatigue cracks, ultimately rebonding the crack faces after self-healing. Furthermore, self-healing composite laminates exhibit a higher resistance to crack growth as a result of the presence of the embedded microcapsules. The fatigue behavior of laminated self-healing composites demonstrates the potential for extended fatigue life of fiber-reinforced polymer composites for structural applications.

AB - Self-healing of fatigue damage is reported in laminated composites fabricated from unidirectional glass/epoxy prepreg with embedded microcapsules. Microcapsules (ca. 2.5 μm) containing a mixture of ethyl phenylacetate (EPA) solvent and diglycidyl ether of bisphenol A (DGEBA) epoxy are seamlessly incorporated into cross-ply [(0/90 3 ) 4 /0] T laminated composites. Specimens subjected to tension-tension fatigue testing followed by a 24 h rest period at ambient conditions recover 52% of the initial Young's modulus as a result of self-healing. Fluorescent labeling of microcapsules and matrix resin combined with confocal fluorescent imaging reveals that the healing agents wick into transverse fatigue cracks, ultimately rebonding the crack faces after self-healing. Furthermore, self-healing composite laminates exhibit a higher resistance to crack growth as a result of the presence of the embedded microcapsules. The fatigue behavior of laminated self-healing composites demonstrates the potential for extended fatigue life of fiber-reinforced polymer composites for structural applications.

KW - A

KW - B

KW - C

KW - Elastic properties

KW - Fatigue

KW - Functional composites

KW - PMCs

KW - Transverse cracking

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SN - 0266-3538

VL - 175

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EP - 127

JO - Composites Science and Technology

JF - Composites Science and Technology

ER -

Self-healing of fatigue damage in cross-ply glass/epoxy laminates

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