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A Parametric Study of Ridge-cut Explosive Bolts using Hydrocodes
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 Title & Authors
A Parametric Study of Ridge-cut Explosive Bolts using Hydrocodes
Lee, Juho; Han, Jae-Hung; Lee, YeungJo; Lee, Hyoungjin;
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 Abstract
Explosive bolts are one of pyrotechnic release devices, which are highly reliable and efficient for a built-in release. Among them, ridge-cut explosive bolts which utilize shock wave generated by detonation to separate bolt body produce minimal fragments, little swelling and clean breaks. In this study, separation phenomena of ridge-cut explosive bolts or ridge-cut mechanism are computationally analyzed using Hydrocodes. To analyze separation mechanism of ridge-cut explosive bolts, fluid-structure interactions with complex material modeling are essential. For modeling of high explosives (RDX and PETN), Euler elements with Jones-Wilkins-Lee E.O.S. are utilized. For Lagrange elements of bolt body structures, shock E.O.S., Johnson-Cook strength model, and principal stress failure criteria are used. From the computational analysis of the author`s explosive bolt model, computational analysis framework is verified and perfected with tuned failure criteria. Practical design improvements are also suggested based on a parametric study. Some design parameters, such as explosive weights, ridge angle, and ridge position, are chosen that might affect the separation reliability; and analysis is carried out for several designs. The results of this study provide useful information to avoid unnecessary separation experiments related with design parameters.
 Keywords
Pyrotechnics;Ridge-Cut Explosive Bolts;Hydrocodes;Separation Behavior Analysis;
 Language
English
 Cited by
1.
Pyroshock Prediction of Ridge-Cut Explosive Bolts Using Hydrocodes, Shock and Vibration, 2016, 2016, 1  crossref(new windwow)
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