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针对空间可展开机构中使用爆炸螺栓有明显冲击振动缺点的问题,基于液态金属合金材料熔点较低、合金成分可调、材料性质可设计的特性,提出了将液态金属应用于空间可展开机构的锁紧/解锁装置设计中。初步设计了一种锁紧/解锁机构,对设计的机构进行了仿真失效分析,指出该机构在低于2300 N承载力下有着较好的锁紧能力;设计了拉伸承力试验,得到可承受的拉伸应力会大于19.2 MPa的结论,且设计了对锁紧/解锁装置的加热试验,该试验证明机构可顺利解锁。由此初步得出了液态金属可以在空间可展开机构上得到应用的结论,为液态金属在进一步的实际工程应用中提供参考。
In view of the obvious impact vibration problem of exploding bolt in space expandable mechanism, based on the characteristics of low melting point of liquid metal alloy material, adjustable alloy composition and material property design, the paper presents the application of liquid metal to spatially expandable mechanism Locking / unlocking device design. A locking / unlocking mechanism was preliminarily designed and the failure mechanism of the designed mechanism was simulated. It was pointed out that the mechanism had better locking ability under the load of less than 2300 N. The tensile load-bearing test was designed to obtain The tensile stress to be sustained will be greater than the conclusion of 19.2 MPa, and the heating test of the locking / unlocking device is designed, which proves that the mechanism can be smoothly unlocked. Based on this, the conclusion that liquid metal can be applied to the spatially expandable mechanism is obtained initially, which provides a reference for the further application of liquid metal in practical engineering.