The effects of in-service induced reduction of bonding quality on the mode I, II, and I-II fracture toughness of CNT nanocomposites

Masoud Yekani Fard, Brian Raji, John M. Woodward, Aditi Chattopadhyay

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

Abstract

Tests were carried out to determine the interlaminar fracture toughness of stitch-bonded biaxial polymer matrix carbon nanotube nanocomposites for mode I, II, and I-II including durability effects. Analysis of the test specimens in terms of mode I energy release rates showed good agreement among Modified Beam Theory, Compliance Calibration, and Modified Compliance Calibration methods. End-Notched Flexure (ENF) and four point End-Notched Flexure (4ENF) tests gave very consistent crack initiation and propagation results for mode II fracture. The results show that the critical mode I energy release rate for delamination decreases monotonically with increasing mode II loading. The effects of accelerated aging (60°C and 90% Rh) on fracture properties were studied. Early accelerated aging (0-12 months) has the dominant diminishing effect on energy release rate initiation and propagation in composites and nanocomposites.

Original languageEnglish (US)
Title of host publicationAdvances in Aerospace Technology
PublisherAmerican Society of Mechanical Engineers (ASME)
Volume1
ISBN (Electronic)9780791850510
DOIs
StatePublished - 2016
EventASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016 - Phoenix, United States
Duration: Nov 11 2016Nov 17 2016

Other

OtherASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016
CountryUnited States
CityPhoenix
Period11/11/1611/17/16

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Energy release rate
Fracture toughness
Nanocomposites
Aging of materials
Calibration
Polymer matrix
Crack initiation
Delamination
Crack propagation
Carbon nanotubes
Durability
Composite materials
Compliance

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

The effects of in-service induced reduction of bonding quality on the mode I, II, and I-II fracture toughness of CNT nanocomposites. / Yekani Fard, Masoud; Raji, Brian; Woodward, John M.; Chattopadhyay, Aditi.

Advances in Aerospace Technology. Vol. 1 American Society of Mechanical Engineers (ASME), 2016.

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

Yekani Fard, M, Raji, B, Woodward, JM & Chattopadhyay, A 2016, The effects of in-service induced reduction of bonding quality on the mode I, II, and I-II fracture toughness of CNT nanocomposites. in Advances in Aerospace Technology. vol. 1, American Society of Mechanical Engineers (ASME), ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016, Phoenix, United States, 11/11/16. https://doi.org/10.1115/IMECE201666907
Yekani Fard, Masoud ; Raji, Brian ; Woodward, John M. ; Chattopadhyay, Aditi. / The effects of in-service induced reduction of bonding quality on the mode I, II, and I-II fracture toughness of CNT nanocomposites. Advances in Aerospace Technology. Vol. 1 American Society of Mechanical Engineers (ASME), 2016.
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