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

doi:10.1115/IMECE201666907

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 proceeding › Conference contribution

1 Scopus citations

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 language	English (US)
Title of host publication	Advances in Aerospace Technology
Publisher	American Society of Mechanical Engineers (ASME)
Volume	1
ISBN (Electronic)	9780791850510
DOIs	https://doi.org/10.1115/IMECE201666907
State	Published - 2016
Event	ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016 - Phoenix, United States Duration: Nov 11 2016 → Nov 17 2016

Other

Other	ASME 2016 International Mechanical Engineering Congress and Exposition, IMECE 2016
Country/Territory	United States
City	Phoenix
Period	11/11/16 → 11/17/16

ASJC Scopus subject areas

Mechanical Engineering

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10.1115/IMECE201666907

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

Research output: Chapter in Book/Report/Conference proceeding › Conference 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

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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.",

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AU - Chattopadhyay, Aditi

PY - 2016

Y1 - 2016

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AB - 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.

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

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