Print Email Facebook Twitter Impact damage of composite laminates with high-speed waterjet Title Impact damage of composite laminates with high-speed waterjet Author Hou, Naidan (Northwestern Polytechnical University; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application) Zhao, Renxi (Northwestern Polytechnical University; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application) Li, Jian (School of Aeronautics; Northwestern Polytechnical University; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application) Wang, Xuan (School of Aeronautics; Northwestern Polytechnical University; Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application) Li, X. (TU Delft Structural Integrity & Composites) Cui, Hao (School of Civil Aviation; Northwestern Polytechnical University; NPU Yangzi River Delta Research Institute) Li, Yulong (Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application; Northwestern Polytechnical University; NPU Yangzi River Delta Research Institute) Date 2022 Abstract Rain erosion may cause substantial damage to aircrafts during supersonic flight. Such event is investigated here via high-speed waterjet impact on composite laminates. An experimental setup is developed to produce waterjets with the speed up to 700m/s and a finite element model of the waterjet-composite impact event is established. The consistency of experiment and simulation results validates the adopted numerical methods. The distribution of the water-hammer pressure is non-uniform and the maximum pressure occurs near the contact periphery when the water is about to eject laterally. After a high-speed (300∼560m/s) waterjet impacts a composite laminate, the impacted surface depression is observed, and the typical surface damage presents a central region with no visible surface damage surrounded by a faded “failure ring” with resin removal, matrix cracking and minor fiber fracture. Delamination occurs at the interfaces of adjacent layers with unequal dimensions and longitudinal matrix cracking appears on the back surface. Both the velocity and the diameter of waterjets are crucial factors on CFRP damage extents. Water-hammer pressure, the stagnation pressure and propagation of stress waves are failure mechanisms for most matrix damage in CFRP impacted by waterjets. Subject CFRPDamage mechanicsFinite element analysisLiquid impactWater-hammer pressure To reference this document use: http://resolver.tudelft.nl/uuid:4eb27dae-1f14-4116-9645-ee67e6d17493 DOI https://doi.org/10.1016/j.ijimpeng.2022.104276 Embargo date 2023-07-01 ISSN 0734-743X Source International Journal of Impact Engineering, 167 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Naidan Hou, Renxi Zhao, Jian Li, Xuan Wang, X. Li, Hao Cui, Yulong Li Files PDF 1_s2.0_S0734743X22001221_main.pdf 13.22 MB Close viewer /islandora/object/uuid:4eb27dae-1f14-4116-9645-ee67e6d17493/datastream/OBJ/view