Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading

P. Kuhn; G. Catalanotti; J. Xavier; P. P. Camanho; H. Koerber

doi:10.1016/j.compstruct.2017.09.040

Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading

P. Kuhn^*, G. Catalanotti, J. Xavier, P. P. Camanho, H. Koerber

^*Corresponding author for this work

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

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Abstract

This work presents an experimental method to measure the compressive crack resistance curve of fiber-reinforced polymer composites when subjected to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve. Double-edge notched specimens of four different sizes are used. Both split-Hopkinson pressure bar and quasi-static reference tests are performed. The full crack resistance curves at both investigated strain rate regimes are obtained on the basis of quasi-static fracture analysis theory. The results show that the steady state fracture toughness of the fiber compressive failure mode of the unidirectional carbon-epoxy composite material IM7-8552 is 165.6 kJ/m² and 101.6 kJ/m² under dynamic and quasi-static loading, respectively. Therefore the intralaminar fracture toughness in compression is found to increase with increasing strain rate.

Original language	English
Pages (from-to)	164-175
Journal	Composite Structures
Volume	182
Early online date	18 Sept 2017
DOIs	https://doi.org/10.1016/j.compstruct.2017.09.040
Publication status	Published - 15 Dec 2017

Keywords

Dynamic fracture
Fiber-reinforced composites
R-curve
Size effect

ASJC Scopus subject areas

Ceramics and Composites
Civil and Structural Engineering

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10.1016/j.compstruct.2017.09.040Licence: Unspecified

Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading
Copyright 2017 Elsevier. This manuscript is distributed under a Creative Commons Attribution-NonCommercial-NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits distribution and reproduction for non-commercial purposes, provided the author and source are cited.
Accepted author manuscript, 6.71 MBLicence: CC BY-NC-ND

Cite this

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title = "Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading",

abstract = "This work presents an experimental method to measure the compressive crack resistance curve of fiber-reinforced polymer composites when subjected to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve. Double-edge notched specimens of four different sizes are used. Both split-Hopkinson pressure bar and quasi-static reference tests are performed. The full crack resistance curves at both investigated strain rate regimes are obtained on the basis of quasi-static fracture analysis theory. The results show that the steady state fracture toughness of the fiber compressive failure mode of the unidirectional carbon-epoxy composite material IM7-8552 is 165.6 kJ/m2 and 101.6 kJ/m2 under dynamic and quasi-static loading, respectively. Therefore the intralaminar fracture toughness in compression is found to increase with increasing strain rate.",

keywords = "Dynamic fracture, Fiber-reinforced composites, R-curve, Size effect",

author = "P. Kuhn and G. Catalanotti and J. Xavier and Camanho, {P. P.} and H. Koerber",

year = "2017",

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doi = "10.1016/j.compstruct.2017.09.040",

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T1 - Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading

AU - Kuhn, P.

AU - Catalanotti, G.

AU - Xavier, J.

AU - Camanho, P. P.

AU - Koerber, H.

PY - 2017/12/15

Y1 - 2017/12/15

N2 - This work presents an experimental method to measure the compressive crack resistance curve of fiber-reinforced polymer composites when subjected to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve. Double-edge notched specimens of four different sizes are used. Both split-Hopkinson pressure bar and quasi-static reference tests are performed. The full crack resistance curves at both investigated strain rate regimes are obtained on the basis of quasi-static fracture analysis theory. The results show that the steady state fracture toughness of the fiber compressive failure mode of the unidirectional carbon-epoxy composite material IM7-8552 is 165.6 kJ/m2 and 101.6 kJ/m2 under dynamic and quasi-static loading, respectively. Therefore the intralaminar fracture toughness in compression is found to increase with increasing strain rate.

AB - This work presents an experimental method to measure the compressive crack resistance curve of fiber-reinforced polymer composites when subjected to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve. Double-edge notched specimens of four different sizes are used. Both split-Hopkinson pressure bar and quasi-static reference tests are performed. The full crack resistance curves at both investigated strain rate regimes are obtained on the basis of quasi-static fracture analysis theory. The results show that the steady state fracture toughness of the fiber compressive failure mode of the unidirectional carbon-epoxy composite material IM7-8552 is 165.6 kJ/m2 and 101.6 kJ/m2 under dynamic and quasi-static loading, respectively. Therefore the intralaminar fracture toughness in compression is found to increase with increasing strain rate.

KW - Dynamic fracture

KW - Fiber-reinforced composites

KW - R-curve

KW - Size effect

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JO - Composite Structures

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ER -

Fracture toughness and crack resistance curves for fiber compressive failure mode in polymer composites under high rate loading

Abstract

Keywords

ASJC Scopus subject areas

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