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| Soufivand, Anahita Ahmadi |
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| Fearraigh, B. Ó. |
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| Bhaswant, Maharshi |
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| Mouni, Lotfi |
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| Ghosh, Angsula |
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| Romero Resendiz, Liliana |
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| Mendesfelipe, Cristian |
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| Golias, Evangelos | Lund |
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| Pons, Tony |
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| Ferreira, Saulo Rocha |
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| Sanguineti, M. |
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| Ziegler, Andreas |
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| Zhang, Kailun |
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| Höfer, Philipp |
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| Zhengis, Arshyn |
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| Danelon, Miguel R. |
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| Baral, P. |
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| Beltrán, Ana M. |
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| Vippola, Minnamari | Tampere |
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| Perna, Alessia Serena | Naples |
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| Larsson, Henrik | Stockholm |
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| Kpemou, A. M. |
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| Le Gall, Alice |
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| Matteo, Pietro Di |
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| Kojouri, Ali Shivaie |
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Fan, Jialiang
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2025Combined computational-experimental investigation of residual stresses and pre-cracking in mode I behaviour of thick adhesively bonded GFRP composite jointscitations
- 2024An experimental and analytical study of mode I fracture and crack kinking in thick adhesive jointscitations
- 2024Healable adhesive paste development for thick adhesive joints
- 2024Investigating the mode-I failure behaviour of thick adhesive joints using a coupled computational/experimental approach
- 2024Void content and displacement ratio effects on fatigue crack growth in thick adhesively bonded composite joints under constant amplitude loadingcitations
- 2024Mode I fracture of thick adhesively bonded GFRP composite joints for wind turbine rotor bladescitations
- 2022INVESTIGATION OF BULK ADHESIVE MATERIAL AND THICK ADHESIVE JOINTS FOR WIND TURBINE APPLICATIONS
- 2022FRACTURE OF STRUCTURAL ADHESIVE UNDER PURE MODE III LOADING CONDITIONS: EXPERIMENTAL STUDY AND CHALLENGES
Places of action
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conferencepaper
Investigating the mode-I failure behaviour of thick adhesive joints using a coupled computational/experimental approach
Abstract
Wind turbine blades are manufactured by molding them in two halves and joining them using thick adhesive joints. The failure of these adhesive joints, particularly in the trailing edge of the blades, compromises the structural integrity of the wind turbine. Therefore, comprehending the mechanisms of failure in adhesive joints is critical to designing wind turbine blades efficiently. For this purpose, the present study proposes a novel approach that integrates computational and experimental methods to enhance the overall understanding of the factors that influence the failure of thick adhesive joints. The experimental specimens consist of two cross-ply glass fibre composite laminates bonded with a ~10 mm thick layer of an epoxy-based adhesive. The specimens are cured at 70°C. After curing, a pre-crack is generated within the adhesive layers of each specimen. The specimen is subjected to Double Cantilever Beam (DCB) tests at room temperature to induce mode I failure. The load-displacement curves of the DCB specimens are obtained. The strain in the adhesive layer is determined using the Digital Image Correlation (DIC). Finite Element (FE) models of the DCB specimens having virtually generated pre-cracks are created to predict the experimental load-displacement curves. So far, most researchers have employed the cohesive zone model for the adhesive in such numerical studies. However, epoxy-based adhesives typically exhibit plastic deformation. Hence, the Drucker-Prager plasticity criteria are utilised to model the mechanical response of the adhesive. Also, it is crucial to assess the influence of thermal residual stresses that arise from the thermal mismatch between composites and adhesives, an aspect that has not been adequately addressed in the literature. Thus, appropriate thermal expansion coefficients are assigned to both composites and adhesives. Furthermore, a cool-down is simulated before mechanical loads to mimic the temperature transition from curing to room temperature. A very good agreement is observed between the experimental and numerical results. A satisfying correlation is also observed between the FE analysis and the DIC, further verifying the effectiveness of the proposed modelling strategy.