Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples
The Asymmetric Double Cantilever Beam (ADCB) is a common test configuration used to produce mixed mode I/II in composite materials. It consists of two sublaminates with different thicknesses or elastic properties, a situation that usually occurs in bimaterial adhesive joints. During this test, the s...
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2025-05-01
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| author | Jorge Bonhomme Victoria Mollón Jaime Viña Antonio Argüelles |
| author_facet | Jorge Bonhomme Victoria Mollón Jaime Viña Antonio Argüelles |
| author_sort | Jorge Bonhomme |
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| description | The Asymmetric Double Cantilever Beam (ADCB) is a common test configuration used to produce mixed mode I/II in composite materials. It consists of two sublaminates with different thicknesses or elastic properties, a situation that usually occurs in bimaterial adhesive joints. During this test, the sample undergoes rotation. In this work, the influence of this rotation on the calculation of the energy release rate (ERR) in modes I and II was studied using the Finite Element Method (FEM). Several models with different degrees of asymmetry (different thickness ratio and/or elastic modulus ratio) and different applied displacements were prepared to obtain different levels of rotation during the test. As is known, the concept of modes I and II refers to the components of the energy release rate calculated in the direction perpendicular and tangential to the delamination plane, respectively. If the model experiences significant rotation during the application of the load, this non-linearity must be considered in the calculation of the mode partition I/II. In this work, appreciable differences were observed in the values of modes I and II, depending on their calculation in a global system or a local system that rotates with the sample. When performing crack growth calculations, the difference between critical loads can be in the order of 4%, while the difference between mode I and mode II results can reach 4% and 14%, respectively, for an applied displacement of only 5 mm. Currently, this correction is not usually implemented in Finite Element calculation codes or in analytical developments. The purpose of this article is to draw attention to this aspect when the rotation of the specimen is not negligible. |
| format | Article |
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| spelling | doaj-art-c1d3a94dd502425fb15601996d709fb52025-08-20T03:26:56ZengMDPI AGFibers2079-64392025-05-011367010.3390/fib13060070Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB SamplesJorge Bonhomme0Victoria Mollón1Jaime Viña2Antonio Argüelles3Department of Construction and Manufacturing Engineering, University of Oviedo, 33203 Gijón, SpainDepartment of Materials Science and Metallurgical Engineering, University of Oviedo, 33203 Gijón, SpainDepartment of Materials Science and Metallurgical Engineering, University of Oviedo, 33203 Gijón, SpainDepartment of Construction and Manufacturing Engineering, University of Oviedo, 33203 Gijón, SpainThe Asymmetric Double Cantilever Beam (ADCB) is a common test configuration used to produce mixed mode I/II in composite materials. It consists of two sublaminates with different thicknesses or elastic properties, a situation that usually occurs in bimaterial adhesive joints. During this test, the sample undergoes rotation. In this work, the influence of this rotation on the calculation of the energy release rate (ERR) in modes I and II was studied using the Finite Element Method (FEM). Several models with different degrees of asymmetry (different thickness ratio and/or elastic modulus ratio) and different applied displacements were prepared to obtain different levels of rotation during the test. As is known, the concept of modes I and II refers to the components of the energy release rate calculated in the direction perpendicular and tangential to the delamination plane, respectively. If the model experiences significant rotation during the application of the load, this non-linearity must be considered in the calculation of the mode partition I/II. In this work, appreciable differences were observed in the values of modes I and II, depending on their calculation in a global system or a local system that rotates with the sample. When performing crack growth calculations, the difference between critical loads can be in the order of 4%, while the difference between mode I and mode II results can reach 4% and 14%, respectively, for an applied displacement of only 5 mm. Currently, this correction is not usually implemented in Finite Element calculation codes or in analytical developments. The purpose of this article is to draw attention to this aspect when the rotation of the specimen is not negligible.https://www.mdpi.com/2079-6439/13/6/70FEMcomposite laminateinterlaminar fracture toughnessmixed modedelaminationCFRP |
| spellingShingle | Jorge Bonhomme Victoria Mollón Jaime Viña Antonio Argüelles Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples Fibers FEM composite laminate interlaminar fracture toughness mixed mode delamination CFRP |
| title | Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples |
| title_full | Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples |
| title_fullStr | Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples |
| title_full_unstemmed | Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples |
| title_short | Influence of Geometric Non-Linearities on the Mixed-Mode Decomposition in Asymmetric DCB Samples |
| title_sort | influence of geometric non linearities on the mixed mode decomposition in asymmetric dcb samples |
| topic | FEM composite laminate interlaminar fracture toughness mixed mode delamination CFRP |
| url | https://www.mdpi.com/2079-6439/13/6/70 |
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