Determination of mode I dynamic fracture toughness of IM7-8552 composites by digital image correlation and machine learning

Rafael A. Cidade; Daniel S.V. Castro; Enrique M. Castrodeza; Peter Kuhn; Giuseppe Catalanotti; Jose Xavier; Pedro P. Camanho

doi:10.1016/j.compstruct.2018.11.089

Determination of mode I dynamic fracture toughness of IM7-8552 composites by digital image correlation and machine learning

Rafael A. Cidade^*, Daniel S.V. Castro, Enrique M. Castrodeza, Peter Kuhn, Giuseppe Catalanotti, Jose Xavier, Pedro P. Camanho

^*Corresponding author for this work

School of Mechanical and Aerospace Engineering

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

11 Citations (Scopus)

394 Downloads (Pure)

Abstract

An optical experimental procedure for evaluating the J-Integral from full-field displacement fields under dynamic loading is proposed in this work. The methodology is applied to measure the J-integral in the dynamic compressive loading of fiber-reinforced composites and to calculate the dynamic fracture toughness associated with the propagation of a kink-band. A modified J-Integral that considers inertia effects is calculated over the full-field measurements obtained by digital image correlation, for double edge-notched specimen of IM7-8552 laminates dynamically loaded in a split-Hopkinson pressure bar (SHPB). A sensibility study is conducted to address the influence of the speckle parameters. The results show good agreement with experimental observations obtained by using a different data reduction method, suggesting the existence of a rising R-curve for the studied material under dynamic loading. Furthermore, it was noticed that the inertia effect can be negligible, indicating a state of dynamic equilibrium in which quasi-static approaches may comfortably be used.

Original language	English
Pages (from-to)	707-714
Number of pages	8
Journal	Composite Structures
Volume	210
Early online date	01 Dec 2018
DOIs	https://doi.org/10.1016/j.compstruct.2018.11.089
Publication status	Published - 15 Feb 2019

Keywords

Digital image correlation (DIC)
Dynamic fracture toughness
Fiber-reinforced composite materials
J-Integral

ASJC Scopus subject areas

Ceramics and Composites
Civil and Structural Engineering

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Determination of Mode I Dynamic Fracture Toughness of IM7-8552 Composites by Digital Image Correlation and Machine Learning
Copyright 2018 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, 750 KBLicence: CC BY-NC-ND

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title = "Determination of mode I dynamic fracture toughness of IM7-8552 composites by digital image correlation and machine learning",

abstract = "An optical experimental procedure for evaluating the J-Integral from full-field displacement fields under dynamic loading is proposed in this work. The methodology is applied to measure the J-integral in the dynamic compressive loading of fiber-reinforced composites and to calculate the dynamic fracture toughness associated with the propagation of a kink-band. A modified J-Integral that considers inertia effects is calculated over the full-field measurements obtained by digital image correlation, for double edge-notched specimen of IM7-8552 laminates dynamically loaded in a split-Hopkinson pressure bar (SHPB). A sensibility study is conducted to address the influence of the speckle parameters. The results show good agreement with experimental observations obtained by using a different data reduction method, suggesting the existence of a rising R-curve for the studied material under dynamic loading. Furthermore, it was noticed that the inertia effect can be negligible, indicating a state of dynamic equilibrium in which quasi-static approaches may comfortably be used.",

keywords = "Digital image correlation (DIC), Dynamic fracture toughness, Fiber-reinforced composite materials, J-Integral",

author = "Cidade, {Rafael A.} and Castro, {Daniel S.V.} and Castrodeza, {Enrique M.} and Peter Kuhn and Giuseppe Catalanotti and Jose Xavier and Camanho, {Pedro P.}",

year = "2019",

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doi = "10.1016/j.compstruct.2018.11.089",

language = "English",

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AU - Cidade, Rafael A.

AU - Castro, Daniel S.V.

AU - Castrodeza, Enrique M.

AU - Kuhn, Peter

AU - Catalanotti, Giuseppe

AU - Xavier, Jose

AU - Camanho, Pedro P.

PY - 2019/2/15

Y1 - 2019/2/15

N2 - An optical experimental procedure for evaluating the J-Integral from full-field displacement fields under dynamic loading is proposed in this work. The methodology is applied to measure the J-integral in the dynamic compressive loading of fiber-reinforced composites and to calculate the dynamic fracture toughness associated with the propagation of a kink-band. A modified J-Integral that considers inertia effects is calculated over the full-field measurements obtained by digital image correlation, for double edge-notched specimen of IM7-8552 laminates dynamically loaded in a split-Hopkinson pressure bar (SHPB). A sensibility study is conducted to address the influence of the speckle parameters. The results show good agreement with experimental observations obtained by using a different data reduction method, suggesting the existence of a rising R-curve for the studied material under dynamic loading. Furthermore, it was noticed that the inertia effect can be negligible, indicating a state of dynamic equilibrium in which quasi-static approaches may comfortably be used.

AB - An optical experimental procedure for evaluating the J-Integral from full-field displacement fields under dynamic loading is proposed in this work. The methodology is applied to measure the J-integral in the dynamic compressive loading of fiber-reinforced composites and to calculate the dynamic fracture toughness associated with the propagation of a kink-band. A modified J-Integral that considers inertia effects is calculated over the full-field measurements obtained by digital image correlation, for double edge-notched specimen of IM7-8552 laminates dynamically loaded in a split-Hopkinson pressure bar (SHPB). A sensibility study is conducted to address the influence of the speckle parameters. The results show good agreement with experimental observations obtained by using a different data reduction method, suggesting the existence of a rising R-curve for the studied material under dynamic loading. Furthermore, it was noticed that the inertia effect can be negligible, indicating a state of dynamic equilibrium in which quasi-static approaches may comfortably be used.

KW - Digital image correlation (DIC)

KW - Dynamic fracture toughness

KW - Fiber-reinforced composite materials

KW - J-Integral

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DO - 10.1016/j.compstruct.2018.11.089

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JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -

Determination of mode I dynamic fracture toughness of IM7-8552 composites by digital image correlation and machine learning

Abstract

Keywords

ASJC Scopus subject areas

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