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Influence of environment conditioning on the interlaminar fracture toughness of a graphite/epoxy unidirectional material.

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Title: Influence of environment conditioning on the interlaminar fracture toughness of a graphite/epoxy unidirectional material.
Authors: Boni, L.1 luisa.boni@unipi.it, Fanteria, D.1 daniele.fanteria@unipi.it, Lazzeri, L.1 luigi.lazzeri@unipi.it, Panettieri, E.2 enrico.panettieri@for.unipi.it, Mariani, U.3 ugo.mariani@leonardocompany.com, Rigamonti, M.3 marco.rigamonti@leonardocompany.com
Source: Composites: Part B, Engineering. Nov2018, Vol. 153, p97-107. 11p.
Subjects: Fracture toughness, Graphite, Epoxy resins, Aeronautics, Moisture
Abstract: Abstract An experimental program has been carried out at the Department of Civil and Industrial Engineering of the University of Pisa, in collaboration with Leonardo Helicopter Division (formerly AgustaWestland), for the evaluation of the interlaminar fracture resistance of Hexcel 913C-HTA, a graphite/epoxy system commonly used in many aeronautical platforms. The study comprised mode I tests (carried out on DCB specimens), mode II tests (using ENF specimens) and Mixed Mode I + II tests (carried out by means of the Mixed Mode Bending procedure). A complete description of the fracture toughness was so obtained, at Room Temperature and on dry specimens. This picture was completed by the assessment of temperature and moisture effects, by means of a few additional tests, performed at high temperature, 70 °C, on DCB and ENF saturated coupons, conditioned in an environmental chamber at 70 °C and 85% RH. The results showed an increase in mode I resistance and a decrease in mode II toughness, in agreement with similar results available in the literature. [ABSTRACT FROM AUTHOR]
Copyright of Composites: Part B, Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 132346548
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Influence of environment conditioning on the interlaminar fracture toughness of a graphite/epoxy unidirectional material.
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  Data: <searchLink fieldCode="AR" term="%22Boni%2C+L%2E%22">Boni, L.</searchLink><relatesTo>1</relatesTo><i> luisa.boni@unipi.it</i><br /><searchLink fieldCode="AR" term="%22Fanteria%2C+D%2E%22">Fanteria, D.</searchLink><relatesTo>1</relatesTo><i> daniele.fanteria@unipi.it</i><br /><searchLink fieldCode="AR" term="%22Lazzeri%2C+L%2E%22">Lazzeri, L.</searchLink><relatesTo>1</relatesTo><i> luigi.lazzeri@unipi.it</i><br /><searchLink fieldCode="AR" term="%22Panettieri%2C+E%2E%22">Panettieri, E.</searchLink><relatesTo>2</relatesTo><i> enrico.panettieri@for.unipi.it</i><br /><searchLink fieldCode="AR" term="%22Mariani%2C+U%2E%22">Mariani, U.</searchLink><relatesTo>3</relatesTo><i> ugo.mariani@leonardocompany.com</i><br /><searchLink fieldCode="AR" term="%22Rigamonti%2C+M%2E%22">Rigamonti, M.</searchLink><relatesTo>3</relatesTo><i> marco.rigamonti@leonardocompany.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Composites%3A+Part+B%2C+Engineering%22">Composites: Part B, Engineering</searchLink>. Nov2018, Vol. 153, p97-107. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Fracture+toughness%22">Fracture toughness</searchLink><br /><searchLink fieldCode="DE" term="%22Graphite%22">Graphite</searchLink><br /><searchLink fieldCode="DE" term="%22Epoxy+resins%22">Epoxy resins</searchLink><br /><searchLink fieldCode="DE" term="%22Aeronautics%22">Aeronautics</searchLink><br /><searchLink fieldCode="DE" term="%22Moisture%22">Moisture</searchLink>
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  Data: Abstract An experimental program has been carried out at the Department of Civil and Industrial Engineering of the University of Pisa, in collaboration with Leonardo Helicopter Division (formerly AgustaWestland), for the evaluation of the interlaminar fracture resistance of Hexcel 913C-HTA, a graphite/epoxy system commonly used in many aeronautical platforms. The study comprised mode I tests (carried out on DCB specimens), mode II tests (using ENF specimens) and Mixed Mode I + II tests (carried out by means of the Mixed Mode Bending procedure). A complete description of the fracture toughness was so obtained, at Room Temperature and on dry specimens. This picture was completed by the assessment of temperature and moisture effects, by means of a few additional tests, performed at high temperature, 70 °C, on DCB and ENF saturated coupons, conditioned in an environmental chamber at 70 °C and 85% RH. The results showed an increase in mode I resistance and a decrease in mode II toughness, in agreement with similar results available in the literature. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Composites: Part B, Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.compositesb.2018.07.044
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        Text: English
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        Type: general
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      – SubjectFull: Epoxy resins
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      – SubjectFull: Aeronautics
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              Text: Nov2018
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