In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials

Bonsung Koo, Jack Miller, Ryan Gunkel, Aditi Chattopadhyay, Lenore Dai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Optical responses of mechanophore (stress-responsive materials) in fiber reinforced polymer composites under mechanical loads were characterized. A new experimental system was developed to capture in situ mechanophore activation by recording ultraviolet (UV) excited fluorescence during uniaxial load tests. Anthracene-based mechanophore, dimeric 9-Anthracene carboxylic acid (Di-AC) was synthesized and incorporated into an epoxy-based thermoset successfully. This Di-AC embedded epoxy mixture was applied to glass fiber fabric to fabricate mechanophore embedded glass fiber reinforced polymer (GFRP) composites through hand-layup process. Quasistatic and cyclic loads were performed to investigate the effect of different types of loads on mechanophore activation. The results indicated that mechanophore activation occurred at the beginning of the test during the quasistatic loading test and continued linearly before yield. Microcracks were formed in the matrix prior to yield, and UV intensity of the mechanophore exhibited nonlinear response. During fatigue tests, the intensity of fluorescence increased after a certain number of cycles. Microcracks were initiated around the middle stage of the fatigue test, the intensity also showed a nonlinear response. The potential of anthracene-based mechanophore for early damage detection in GFRP under complex loading was observed.

Original languageEnglish (US)
Title of host publication33rd Technical Conference of the American Society for Composites 2018
PublisherDEStech Publications Inc.
Pages2894-2903
Number of pages10
Volume5
ISBN (Electronic)9781510872073
StatePublished - Jan 1 2018
Event33rd Technical Conference of the American Society for Composites 2018 - Seattle, United States
Duration: Sep 24 2018Sep 27 2018

Other

Other33rd Technical Conference of the American Society for Composites 2018
CountryUnited States
CitySeattle
Period9/24/189/27/18

Fingerprint

Anthracene
Polymers
Chemical activation
Microcracks
Glass fibers
Fibers
Composite materials
Fluorescence
Carboxylic acids
Fatigue of materials
Cyclic loads
Damage detection
Thermosets
fiberglass
9-anthroic acid
anthracene

ASJC Scopus subject areas

  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Metals and Alloys

Cite this

Koo, B., Miller, J., Gunkel, R., Chattopadhyay, A., & Dai, L. (2018). In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials. In 33rd Technical Conference of the American Society for Composites 2018 (Vol. 5, pp. 2894-2903). DEStech Publications Inc..

In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials. / Koo, Bonsung; Miller, Jack; Gunkel, Ryan; Chattopadhyay, Aditi; Dai, Lenore.

33rd Technical Conference of the American Society for Composites 2018. Vol. 5 DEStech Publications Inc., 2018. p. 2894-2903.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Koo, B, Miller, J, Gunkel, R, Chattopadhyay, A & Dai, L 2018, In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials. in 33rd Technical Conference of the American Society for Composites 2018. vol. 5, DEStech Publications Inc., pp. 2894-2903, 33rd Technical Conference of the American Society for Composites 2018, Seattle, United States, 9/24/18.
Koo B, Miller J, Gunkel R, Chattopadhyay A, Dai L. In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials. In 33rd Technical Conference of the American Society for Composites 2018. Vol. 5. DEStech Publications Inc. 2018. p. 2894-2903
Koo, Bonsung ; Miller, Jack ; Gunkel, Ryan ; Chattopadhyay, Aditi ; Dai, Lenore. / In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials. 33rd Technical Conference of the American Society for Composites 2018. Vol. 5 DEStech Publications Inc., 2018. pp. 2894-2903
@inproceedings{0cdde79d2cc347e1b357c8b2e83f1428,
title = "In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials",
abstract = "Optical responses of mechanophore (stress-responsive materials) in fiber reinforced polymer composites under mechanical loads were characterized. A new experimental system was developed to capture in situ mechanophore activation by recording ultraviolet (UV) excited fluorescence during uniaxial load tests. Anthracene-based mechanophore, dimeric 9-Anthracene carboxylic acid (Di-AC) was synthesized and incorporated into an epoxy-based thermoset successfully. This Di-AC embedded epoxy mixture was applied to glass fiber fabric to fabricate mechanophore embedded glass fiber reinforced polymer (GFRP) composites through hand-layup process. Quasistatic and cyclic loads were performed to investigate the effect of different types of loads on mechanophore activation. The results indicated that mechanophore activation occurred at the beginning of the test during the quasistatic loading test and continued linearly before yield. Microcracks were formed in the matrix prior to yield, and UV intensity of the mechanophore exhibited nonlinear response. During fatigue tests, the intensity of fluorescence increased after a certain number of cycles. Microcracks were initiated around the middle stage of the fatigue test, the intensity also showed a nonlinear response. The potential of anthracene-based mechanophore for early damage detection in GFRP under complex loading was observed.",
author = "Bonsung Koo and Jack Miller and Ryan Gunkel and Aditi Chattopadhyay and Lenore Dai",
year = "2018",
month = "1",
day = "1",
language = "English (US)",
volume = "5",
pages = "2894--2903",
booktitle = "33rd Technical Conference of the American Society for Composites 2018",
publisher = "DEStech Publications Inc.",
address = "United States",

}

TY - GEN

T1 - In-situ damage precursor detection in fiber reinforced composites using mechanochemical materials

AU - Koo, Bonsung

AU - Miller, Jack

AU - Gunkel, Ryan

AU - Chattopadhyay, Aditi

AU - Dai, Lenore

PY - 2018/1/1

Y1 - 2018/1/1

N2 - Optical responses of mechanophore (stress-responsive materials) in fiber reinforced polymer composites under mechanical loads were characterized. A new experimental system was developed to capture in situ mechanophore activation by recording ultraviolet (UV) excited fluorescence during uniaxial load tests. Anthracene-based mechanophore, dimeric 9-Anthracene carboxylic acid (Di-AC) was synthesized and incorporated into an epoxy-based thermoset successfully. This Di-AC embedded epoxy mixture was applied to glass fiber fabric to fabricate mechanophore embedded glass fiber reinforced polymer (GFRP) composites through hand-layup process. Quasistatic and cyclic loads were performed to investigate the effect of different types of loads on mechanophore activation. The results indicated that mechanophore activation occurred at the beginning of the test during the quasistatic loading test and continued linearly before yield. Microcracks were formed in the matrix prior to yield, and UV intensity of the mechanophore exhibited nonlinear response. During fatigue tests, the intensity of fluorescence increased after a certain number of cycles. Microcracks were initiated around the middle stage of the fatigue test, the intensity also showed a nonlinear response. The potential of anthracene-based mechanophore for early damage detection in GFRP under complex loading was observed.

AB - Optical responses of mechanophore (stress-responsive materials) in fiber reinforced polymer composites under mechanical loads were characterized. A new experimental system was developed to capture in situ mechanophore activation by recording ultraviolet (UV) excited fluorescence during uniaxial load tests. Anthracene-based mechanophore, dimeric 9-Anthracene carboxylic acid (Di-AC) was synthesized and incorporated into an epoxy-based thermoset successfully. This Di-AC embedded epoxy mixture was applied to glass fiber fabric to fabricate mechanophore embedded glass fiber reinforced polymer (GFRP) composites through hand-layup process. Quasistatic and cyclic loads were performed to investigate the effect of different types of loads on mechanophore activation. The results indicated that mechanophore activation occurred at the beginning of the test during the quasistatic loading test and continued linearly before yield. Microcracks were formed in the matrix prior to yield, and UV intensity of the mechanophore exhibited nonlinear response. During fatigue tests, the intensity of fluorescence increased after a certain number of cycles. Microcracks were initiated around the middle stage of the fatigue test, the intensity also showed a nonlinear response. The potential of anthracene-based mechanophore for early damage detection in GFRP under complex loading was observed.

UR - http://www.scopus.com/inward/record.url?scp=85059427758&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85059427758&partnerID=8YFLogxK

M3 - Conference contribution

VL - 5

SP - 2894

EP - 2903

BT - 33rd Technical Conference of the American Society for Composites 2018

PB - DEStech Publications Inc.

ER -