Determination of pure mode-I fracture toughness of multidirectional composite DCB specimens
In: Engineering Fracture Mechanics, Jg. 252 (2021-07-01), S. 107776-107776
Online
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Zugriff:
Strain energy release rate (SERR) along a linear crack front of a multidirectional composite DCB specimen shows an obviously non-uniform distribution, which causes the fracture toughness GIavg measured by experiments smaller than the real GIC, and so leading to a lower estimation of fracture toughness. In this study, based on the numerical model a novel semi-empirical closed-form formula was proposed for determination of pure mode I fracture toughness of a multidirectional composite DCB specimen via a width-wise non-uniform distribution parameter. These expressions translate the relationships between the width-wise non-uniform distribution ratio and the specimen width as well as the material parameters. They provide a rapid method to measure correctly the pure mode I fracture toughness of an uncoupled multidirectional composite DCB specimen by integrating the effect of non-uniform distribution of the strain energy release rate at the crack front.
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Determination of pure mode-I fracture toughness of multidirectional composite DCB specimens
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Autor/in / Beteiligte Person: | Gong, Xiaojing ; Zhao, Libin ; Curti, Rémi ; Jia, Ruodi ; Institut Clément Ader (ICA) ; Institut National des Sciences Appliquées - Toulouse (INSA Toulouse) ; Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) ; Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi) ; Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO) ; School of Astronautics [Beijing] ; Beihang University (BUAA) ; Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse) ; Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi) ; Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT) |
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Zeitschrift: | Engineering Fracture Mechanics, Jg. 252 (2021-07-01), S. 107776-107776 |
Veröffentlichung: | Elsevier BV, 2021 |
Medientyp: | unknown |
ISSN: | 0013-7944 (print) |
DOI: | 10.1016/j.engfracmech.2021.107776 |
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