Ultrasound-guided fine Z-pin insertion system

被引：1
|
作者：
Fei S.-H. [1 ]
Ding H.-M. [1 ]
Wang H.-J. [1 ]
Li J.-X. [1 ]
机构：
[1] Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, Zhejiang University, Hangzhou
来源：
Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2023年 / 57卷 / 04期
关键词：
composite laminate; fine Z-pin; in-plane damage; interlaminar fracture toughness; ultrasonic vibration;
D O I：
10.3785/j.issn.1008-973X.2023.04.002
中图分类号：
学科分类号：
摘要：
An ultrasound-guided fine Z-pin (with a diameter of 0.11 mm) automatic insertion system was proposed to reduce the in-plane damage of traditional Z-pinned composite laminates. The automatic insertion system was designed and developed by the ultrasound-guided fine Z-pin insertion principle. A longitudinal ultrasonic vibrator was designed and analyzed according to the force characteristics of Z-pin insertion process and the design theory of sandwich piezoelectric transducer. The modal and harmonic response of the vibrator was analyzed by using finite element simulation. Impedance analysis and amplitude measurement of the ultrasonic vibrator was conducted. Results showed that the resonant frequency was 70.062 4 kHz and the actual vibration amplitude was 2.578 µm, which accorded with the simulation results. The ultrasound-guided insertion system was constructed. The in-plane tensile, compressive properties and interlaminar fracture toughness of the fine carbon Z-pinned composite laminates were tested. Results show that the in-plane strength reduction is only 1.6% in tension and 3.4% in compression respectively for unidirectional fiber/epoxy laminates reinforced by carbon Z-pins whose volume fraction is 0.2% and diameter is 0.11 mm. The Mode-I fracture toughness can be improved by 14.4 times. © 2023 Zhejiang University. All rights reserved.
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页码：657 / 665
页数：8
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