Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Combined experimental–numerical mode I fracture characterization of the pultruded composite bars
https://orcid.org/0000-0003-1489-1062
https://orcid.org/0000-0002-5046-5485
https://orcid.org/0000-0002-1178-3368
https://orcid.org/0000-0001-6891-582X
https://orcid.org/0000-0003-3553-6107
https://orcid.org/0000-0002-4413-7266
Abstract In this paper, pultruded GFRP bars are investigated to determine their fracture properties. The double cantilever beam test (DCB) is used to assess fracture behavior under mode I loading conditions. However, due to the presence of the R-curve effect (variable fracture energy dependent on the length of the crack), it is necessary to introduce a nonstandard approach to determine fracture properties. The mixed experimental–numerical approach is proposed to deal with this issue. Numerical simulations were carried out in Simulia Abaqus, and with Python scripting it was possible to generate models and obtain R-curve for the material. The numerical model built based on the experimental results has very good agreement with it (force–displacement and delamination length–time characteristics) which allows the use of the mentioned model in the analysis of more complex structures. Acoustic emission analysis was introduced as an auxiliary technique. The delamination obtained from both the numerical model and the experiment complies with the registered acoustic emission events. The proposed method can be used in preparing a material model for other composite materials, which display the presence of the R-curve effect.
Combined experimental–numerical mode I fracture characterization of the pultruded composite bars
https://orcid.org/0000-0003-1489-1062
https://orcid.org/0000-0002-5046-5485
https://orcid.org/0000-0002-1178-3368
https://orcid.org/0000-0001-6891-582X
https://orcid.org/0000-0003-3553-6107
https://orcid.org/0000-0002-4413-7266
Abstract In this paper, pultruded GFRP bars are investigated to determine their fracture properties. The double cantilever beam test (DCB) is used to assess fracture behavior under mode I loading conditions. However, due to the presence of the R-curve effect (variable fracture energy dependent on the length of the crack), it is necessary to introduce a nonstandard approach to determine fracture properties. The mixed experimental–numerical approach is proposed to deal with this issue. Numerical simulations were carried out in Simulia Abaqus, and with Python scripting it was possible to generate models and obtain R-curve for the material. The numerical model built based on the experimental results has very good agreement with it (force–displacement and delamination length–time characteristics) which allows the use of the mentioned model in the analysis of more complex structures. Acoustic emission analysis was introduced as an auxiliary technique. The delamination obtained from both the numerical model and the experiment complies with the registered acoustic emission events. The proposed method can be used in preparing a material model for other composite materials, which display the presence of the R-curve effect.
Combined experimental–numerical mode I fracture characterization of the pultruded composite bars
https://orcid.org/0000-0003-1489-1062
https://orcid.org/0000-0002-5046-5485
https://orcid.org/0000-0002-1178-3368
https://orcid.org/0000-0001-6891-582X
https://orcid.org/0000-0003-3553-6107
https://orcid.org/0000-0002-4413-7266
Abstract In this paper, pultruded GFRP bars are investigated to determine their fracture properties. The double cantilever beam test (DCB) is used to assess fracture behavior under mode I loading conditions. However, due to the presence of the R-curve effect (variable fracture energy dependent on the length of the crack), it is necessary to introduce a nonstandard approach to determine fracture properties. The mixed experimental–numerical approach is proposed to deal with this issue. Numerical simulations were carried out in Simulia Abaqus, and with Python scripting it was possible to generate models and obtain R-curve for the material. The numerical model built based on the experimental results has very good agreement with it (force–displacement and delamination length–time characteristics) which allows the use of the mentioned model in the analysis of more complex structures. Acoustic emission analysis was introduced as an auxiliary technique. The delamination obtained from both the numerical model and the experiment complies with the registered acoustic emission events. The proposed method can be used in preparing a material model for other composite materials, which display the presence of the R-curve effect.
Combined experimental–numerical mode I fracture characterization of the pultruded composite bars
Archiv.Civ.Mech.Eng
Smolnicki, Michał (Autor:in) / Duda, Szymon (Autor:in) / Zielonka, Paweł (Autor:in) / Stabla, Paweł (Autor:in) / Lesiuk, Grzegorz (Autor:in) / Lopes, Cristiane Caroline Campos (Autor:in)
15.05.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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