Comprehensive analyses of buckling and stress failure of high-field pulsed magnets under biaxial Lorentz force body load. (February 2023)

• Record Type: Journal Article
• Authors: Xiao, Houxiu; Yin, Zhuolei; Chen, Xianfei; Deng, Zhaolun; Wang, Pengbo; Chen, Siyuan; He, Yong
• Is Part Of: Thin-walled structures. Volume 183(2023)
• Publication Date: 2023-02
• Subjects: Pulsed magnets -- Lorentz force -- Stress failure -- Structure buckling -- Interaction -- Mechanical failure; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2022.110341
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: This paper will discuss the failure mechanism of high field pulsed magnets based on a failed pulsed magnet of 85 T. Firstly, the stress failure possibility is analyzed by an ANSYS-ACP finite element model. The results show that the stress failure risk is low. Then a comprehensive model including both stress failure and structural buckling is proposed and discussed. It is found that the structural buckling and stress failure would co-exist and interact with each other. The model predicts the pulsed magnet suffered from stress failure after structural buckling and finally collapsed at 79 T. The consistency of the theoretical results with that in experiments show the validity of the comprehensive model. Highlights: First comprehensive analysis including stress failure and structure buckling of pulsed magnets under biaxial Lorentz force body. It is a typical interdisciplinary and deep study of electromagnetic devices. The simulation results were consistent with the experimental results. The results show that the structural buckling and over-stressing failure would co-exist in pulsed magnets. The bad wettability of Zylon fiber by epoxy resin maybe an important factor of the buckling and failure of pulsed magnets, which will guide the improvement of pulsed magnet technology.