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A Parametric Study of the Functioning of an Axisymmetric Explosive Separation Device

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Abstract

At present, the design and optimization of the linear explosive separation device mainly depends on experiment, which is not only costly but also low efficient. The introduction of finite element analysis prior to experiment may reduce the cost to design a linear explosive separation device. Herein, arbitrary Lagrangian–Eulerian (ALE) numerical method is utilized to investigate the functioning of an axisymmetric explosive separation device. Firstly, several ALE models are validated via explosive separation experiments and photonic Doppler velocimetry (PDV) measurements, and found to have reasonable accuracy. Then, a series of ALE models are developed to study the transient separation process of an axisymmetric explosive separation device. Multiple factors which may influence the process are identified through parametric study. Especially, it is found that the linear density of the explosive core in the detonating cord and the bottom radius of the v-notch on the separation plate are critical for the accumulation of effective plastic strain at the v-notch. In addition, the material of the protection plate and the angle of the v-notch have a certain influence on the effective plastic strain at the v-notch. The material strength of the protection plate almost has little influence on the effective plastic strain at the v-notch. The study may facilitate the optimal design of the axisymmetric explosive separation device.

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Authors and Affiliations

  1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, China

    Guangyu Wang, Quan Wen & Yushi Wang

  2. China Academy of Launch Vehicle Technology, Beijing, China

    Xiaopeng Wang

Authors
  1. Guangyu Wang
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  2. Quan Wen
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  3. Xiaopeng Wang
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  4. Yushi Wang
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Correspondence to Quan Wen.

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Wang, G., Wen, Q., Wang, X. et al. A Parametric Study of the Functioning of an Axisymmetric Explosive Separation Device. Int. J. Aeronaut. Space Sci. 22, 1331–1343 (2021). https://doi.org/10.1007/s42405-021-00404-9

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  • DOI: https://doi.org/10.1007/s42405-021-00404-9

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