Transactions of Nanjing University of Aeronautics & Astronautics
Design of an Experimental Set-up Concerning Interfacial Stress to Promote Measurement Accuracy of Adhesive Shear Strength Between Ice and Substrate
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Abstract:
Accumulation of ice on airfoils and engines seriously endangers the safety of the fight. The accurate measurement of adhesion strength at the ice-substrate interface plays a vital role in the design of anti/de-icing systems. In this pursuit， the present study envisages the evaluation of the stress at the icesubstrate interface to guide the design of experimental set-ups and improve the measurement accuracy of shear strength using the finite element analysis （FEA） method. By considering such factors as the peeling stress， maximum von-mises stress and uniformity of stress， the height and radius of ice and the loading height are investigated. Based on the simulation results， appropriate parameters are selected for the experimental validation. Simulation results show that the peeling stress is decreased by reducing the loading height and increasing the height of ice. Higher ice， increasing loading height and smaller ice radius are found to be beneficial for the uniformity of stress. To avoid cracks or ice-breaking， it is imperative that the ice should be of a small radius and greater height. Parameters including the ice height of 25 mm， radius of 20 mm， and loading height of 9 mm are adopted in the experiment. The results of FEA and the experimental validation can significantly enhance the measurement accuracy of shear strength.
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Project Supported:
This study was supported by the National Natural Science Foundation of China （No.11832012）.
Clc Number:
V244.15
CHINA AERO-SCIENCES
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