PSI - Issue 13

Ahmed Sohail et al. / Procedia Structural Integrity 13 (2018) 450–455 Author name / StructuralIntegrity Procedia 00 (2018) 000 – 000

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4. Conclusion

The impact behavior of 3D hybrid woven composite under high velocity impact was studied numerically in the current study. During the FE simulation, to predict the constitutive and damage behavior of composites during the high velocity impact process, a combination of cohesive contact and continuum shell elements is proposed. Delamination behavior between the laminas is characterized by introducing the cohesive contact between the two adjacent plies using the traction separation law, while damage, induced during the impact process in each layer of composite panel, is depicted by continuum shell elements with Hashin failure criterion. Connector elements containing the failure behavior are introduced into the model to represent the z-yarns of the 3d woven composite. The proposed FE model presented good agreement with experimental results in terms of residual velocity of the impactor and to capture the damage and delamination phenomenon of the composite panel during the impact process and makes it a valuable tool to estimate the damage under the impact process. In this paper, continuum shell elements are used for composite laminates because of their efficiency for the modelling of thin laminated structures as compared to 3D solid elements. Shell elements contain much of the necessary predictive attributes of complex models while providing the computational efficiency without compromising the authenticity of the output results. As it is evident from the results of the numerical model that the shell model can accurately predict the response of the 3D hybrid woven structures efficiently, by that the computational cost can be greatly reduced. Overall, the computational strategy, shell elements for composite laminates, Hashin failure criteria for laminated composite, cohesive contact with cohesive damage for traction separation law and connector element with failure behavior for incorporation z-yarn, reveals excellent results to determine the impact behavior of 3D woven composites and can be adopted for different kind of hybrid and non-hybrid composite structures in future. Abaqus, V., 2014. 6.14 Documentation. Dassault Systemes Simulia Corporation, 651. Baucom, J.A. and Zikry, M.A., 2005. Low-velocity impact damage progression in woven E-glass composite systems. Composites Part A: Applied Science and Manufacturing, 36(5), pp.658-664. Chen, F. and Hodgkinson, J.M., 2009. Impact behaviour of composites with different fibre architecture. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 223(7), pp.1009-1017. Gu, H. and Zhili, Z., 2002. 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