Study on pyroshock propagation through plates with joints and washers

Cited 8 time in webofscience Cited 0 time in scopus
  • Hit : 242
  • Download : 0
Pyrotechnic release devices are widely used in various missions in order to reliably separate the structural parts of the system. However, the pyroshock induced by an explosive pyrotechnic event can lead to fatal malfunctions of the adjacent electrical components. In order to mitigate these pyroshock issues, an accurate understanding of the pyroshock propagation in structures is essential. In this study, an experimental setup for the pyroshock propagation experiments is developed with the pyroshock excitation using pyrotechnic initiators. The pyroshock propagation analysis environment with a commercial hydrocode is established and verified through comparison between the analysis and the experimental results. The pyroshock propagates through the thin plates in the form of flexural waves (or anti-symmetric Lamb waves). Using the established numerical and experimental techniques, the effects of the pyroshock attenuation by the joints and washers are investigated. The plates connected by joints with different materials and the plates connected by joints with inserted washers made of different materials and in different thickness are considered. The experimental and numerical results are in good agreement: the pyroshock attenuation is highly effective when the joints are made of higher density and stiffness materials and when the thickness of the washers is increased. The primary reason for the pyroshock attenuation due to the joints and washers is the flexural wave reflection at the discontinuities caused by acoustic impedance mismatching. (C) 2018 Elsevier Masson SAS. All rights reserved.
Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
Issue Date
2018-08
Language
English
Article Type
Article
Keywords

MOLECULAR-WEIGHT POLYETHYLENE; CUT EXPLOSIVE BOLTS; SHOCK RESPONSE; SHAPED CHARGE; IMPACT; COMPOSITE; SIMULATION; FAILURE; DAMAGE; MODEL

Citation

AEROSPACE SCIENCE AND TECHNOLOGY, v.79, pp.441 - 458

ISSN
1270-9638
DOI
10.1016/j.ast.2018.05.057
URI
http://hdl.handle.net/10203/245577
Appears in Collection
AE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 8 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0