Impact damage of composite laminates with high-speed waterjet

Journal article (2022)

Authors

Naidan Hou Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, Northwestern Polytechnical University
Renxi Zhao Northwestern Polytechnical University, Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application
Jian Li Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, School of Aeronautics, Northwestern Polytechnical University
Xuan Wang Northwestern Polytechnical University, School of Aeronautics, Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application
X. Li Structural Integrity & Composites - Aerospace Engineering
Hao Cui School of Civil Aviation, NPU Yangzi River Delta Research Institute, Northwestern Polytechnical University
Yulong Li NPU Yangzi River Delta Research Institute, Shaanxi Key Laboratory of Impact Dynamics and Its Engineering Application, Northwestern Polytechnical University
Research Group
Applied Mechanics (CEG) (TU Delft)
Copyright: © 2022 Naidan Hou, Renxi Zhao, Jian Li, Xuan Wang, X. Li, Hao Cui, Yulong Li
DOI
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https://doi.org/10.1016/j.ijimpeng.2022.104276
Finite element analysis CFRP Damage mechanics Liquid impact Water-hammer pressure
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Published Date

2022

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Applied Mechanics

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.