PSI - Issue 28

Mamadou Abdoul Mbacké et al. / Procedia Structural Integrity 28 (2020) 1431–1437 Mamadou Abdoul MBACKE/ Structural Integrity Procedia 00 (2019) 000–000

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Fig. 6. Cycle number to failure

5. Conclusion The aim of this study was the implementation of a consistent fatigue-cohesive zone model and its validation. The model of Turon is selected regarding its proven capabilities in lifetime prediction. The model is implemented in Abaqus through user subroutines and successfully validated. First, the model parameters of the cohesive zone model are identified by means of quasi static test. A suitable set of parameters able to reproduce the load-load line displacement curve is then obtained. Thereafter, modeling is completed by some required parameters available from the work of Al-Khudairi et al. in order to run high-cycle fatigue analysis. The results obtained are representative of the experimental data. The Paris law parameters obtained by Al-Khudairi et al. and those obtained from finite element simulations are the same. This proves that the model is well formulated, successfully implemented and suitable for adhesive joints lifetime assessment. Extension of the model to the mode II and mixed-mode cases is almost finalized. A complete model for adhesive joint lifetime prediction will be presented soon. Experimental tests are also performed for the three cases. In future work, the modeling will be validated using our own experimental data and application to renewable energy structures. Acknowledgements Authors gratefully acknowledge all partners of the ONSHORE project: IRT Jules Verne, EDF R&D. References Adamos, L., P. Tsokanas & T. Loutas (2020) An experimental study of the interfacial fracture behavior of Titanium/CFRP adhesive joints under mode I and mode II fatigue. International Journal of Fatigue, 136 , 105586. Al-Khudairi, O., H. Hadavinia, A. Waggott, E. Lewis & C. Little (2015) Characterising mode I/mode II fatigue delamination growth in unidirectional fibre reinforced polymer laminates. Materials & Design (1980-2015), 66 , 93-102. ASTM-D3433-99(2020). 2020. Standard Test Method for Fracture Strength in Cleavage of Adhesives in Bonded Metal Joints. West Conshohocken, PA. Bak, B. L. V., A. Turon, E. Lindgaard & E. Lund (2016) A simulation method for high-cycle fatigue-driven delamination using a cohesive zone model. International Journal for Numerical Methods in Engineering, 106 , 163-191. Ebadi-Rajoli, J., A. Akhavan-Safar, H. Hosseini-Toudeshky & L. F. M. da Silva (2020) Progressive damage modeling of composite materials subjected to mixed mode cyclic loading using cohesive zone model. Mechanics of Materials, 143 , 103322. González Ramírez, F. M., F. P. Garpelli, R. de Cássia Mendonça Sales, G. M. Cândido, M. A. Arbelo, M. Y. Shiino & M. V. Donadon (2018) Experimental characterization of Mode I fatigue delamination growth onset in composite joints: A comparative study. Materials & Design, 160 , 906-914. Harper, P. W. & S. R. Hallett (2008) Cohesive zone length in numerical simulations of composite delamination. Engineering Fracture Mechanics, 75 , 4774-4792. Jiang, H., X. Gao & T. S. Srivatsan (2009) Predicting the influence of overload and loading mode on fatigue crack growth: A numerical approach using irreversible cohesive elements. Finite Elements in Analysis and Design, 45 , 675-685. Jones, R., A. J. Kinloch & W. Hu (2016) Cyclic-fatigue crack growth in composite and adhesively-bonded structures: The FAA slow crack growth approach to certification and the problem of similitude. International Journal of Fatigue, 88 , 10-18. Khoramishad, H., A. D. Crocombe, K. B. Katnam & I. A. Ashcroft (2010) Predicting fatigue damage in adhesively bonded joints using a cohesive zone model. International Journal of Fatigue, 32 , 1146-1158. Ladani, R. B., S. Wu, A. J. Kinloch, K. Ghorbani, A. P. Mouritz & C. H. Wang (2017) Enhancing fatigue resistance and damage characterisation in adhesively bonded composite joints by carbon nanofibres. Composites Science and Technology, 149 , 116-126. Lopes Fernandes, R., S. Teixeira de Freitas, M. K. Budzik, J. A. Poulis & R. Benedictus (2019) From thin to extra-thick adhesive layer thicknesses: Fracture of bonded joints under mode I loading conditions. Engineering Fracture Mechanics, 218 , 106607. Loutas, T., P. Tsokanas, V. Kostopoulos, P. Nijhuis & W. M. van den Brink (2020) Mode I fracture toughness of asymmetric metal-composite adhesive joints. Materials Today: Proceedings. Monteiro, J., A. Akhavan-Safar, R. Carbas, E. Marques, R. Goyal, M. El-zein & L. F. M. da Silva (2019) Mode II modeling of adhesive materials degraded by fatigue loading using cohesive zone elements. Theoretical and Applied Fracture Mechanics, 103 , 102253.