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由于微小型试件动态力学性能研究的重要性与测试的困难性,以及高应变率动态试验研究的需要,研制了基于磁阻式多级电磁发射的微型霍普金森压杆(mini-SHPB)装置。该装置由新型微型霍普金森压杆系统与磁阻式多级电磁发射系统组成。利用电磁脉冲发射原理,巧妙地设计了简单易行的磁阻式多级线圈发射系统,为微型霍普金森压杆系统的撞击杆提供驱动力。文中详细描述了该系统的各部分组成和原理,整个系统简单紧凑。通过应变率不敏感材料2024铝合金的动态压缩试验验证了该装置的可靠性。
Due to the importance of the research on the dynamic mechanical properties of micro-scale specimens and the difficulty of testing, as well as the need of dynamic testing of high strain rates, a mini-SHPB based on the reluctance multi-level electromagnetic emission was developed. Device. The device consists of a new mini Hopkinson pressure bar system and reluctance multi-stage electromagnetic emission system. Using the principle of electromagnetic pulse emission, the magnetoresistive multi-stage coil transmitting system is skilfully designed to provide the driving force for the impact rod of the miniature Hopkinson pressure bar system. The paper describes in detail the various parts of the system and the principle of the whole system is simple and compact. The reliability of the device was verified by the dynamic compression test of 2024 aluminum alloy, a strain rate insensitive material.