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김경주(Kyoung Joo Kim),김재훈(Jae Hoon Kim),이영신(Young Shin Lee),박종호(Jong Ho Park),송기혁(kee Hyeuk Song),구송회(Song Hoe Koo),문순일(Soon Il Moon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
This study is to evaluate fracture pressure and characteristics using ceramics for Dome port cover. Dome port cover has an important role in separation of solid and liquid fuel at rocket. It notices that the port cover which is ceramic material is required to properties of thermal-resistance, high thermal-strength for applying high temperature circumstance. Moreover, Particles of the cover which has to be fractured by ending combustion must not affect structure of combustion chamber with damage. By basic study of cover design we test mechanical properties and fracture toughness of selected ceramics for material properties. In the second place, we test the shape of plate and dome by the shape of structure, evaluated sizes and movements of fragments. This experiment presents shock-fracture of dome port cover using shock tube by means of basic study of design of dome port cover. The results which studies on fracture properties of ceramic are used for basic data of developments and structure designs.
황권태(Kwon-Tae Hwang),김재훈(Jae-Hoon Kim),이영신(Young-Shin Lee),박종호(Jong-Ho Park),송기혁(Kee-Hyeuk Song),윤수진(Su-Jin Yoon) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Fracture characteristics of plates and dome shapes for machinable glass ceramics using compressed shock wave. Machinable glass ceramics have been considered as a promising candidate material for the dome port cover of air breathing engine. This part of the air breathing engine has an important role separating solid and liquid fuel, and needs the frangible characteristics whereby the fracture of a part should not affect the internal components of combustion. The objective of this study are to evaluate the fracture pressure and phenomena of separated membrane using a shock tunnel. The experimental apparatus consists of driver, a driven section and a dump tank. The used material is machinable glass ceramic from Corning company. Specimens are used 3, 4.5 and 6㎜ thickness with plates and dome shapes. It is expected that the results obtained from this study can be used in the basic data for the dome port cover design of an air breathing engine.