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http://dx.doi.org/10.6108/KSPE.2019.23.4.021

A Study on the Burst Pressure of Composite Motor Case due to the Change of Metal Boss PDR Design  

Kim, Namjo (Agency for Defense Development)
Jeong, Seungmin (Agency for Defense Development)
Yun, Kyeongsoo (Agency for Defense Development)
Chung, Sangki (Agency for Defense Development)
Hwang, Taekyung (Agency for Defense Development)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.23, no.4, 2019 , pp. 21-27 More about this Journal
Abstract
Composite motor cases fabricated by the filament winding method are structurally weak in the dome when they are required to withstand the internal pressure of the combustion gas. In this study, a finite element analysis is conducted to compare the burst pressure of a composite dome according to the variation of the pressure distribution ratio(PDR). The performance of the composite motor case was compared quantitatively by calculating the stress on the inner and outer dome surfaces and metal boss volume. As a result, the critical point of the failure mode was observed at a PDR between 2.5 and 3.0. A design at a PDR of 2.5­-3.5 can reduce the weight of metal boss without fluctuation in the burst pressure of the combustion motor case. Moreover as the design reference value changes according to the dome shape and opening size, further analysis and testing are necessary.
Keywords
Composite Motor Case; Pressure Distribution Ratio; Burst Pressure; Index of Performance;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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