| Structural Analysis for Thread Joint Part of Rocket Motor Case Applied Pre-load |
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Song-Hoe Koo, Won-Man Cho, Bang-Eop Lee |
| 초기하중을 받는 로켓모타 케이스 나사체결부의 구조해석 |
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구송회, 조원만, 이방업 |
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국방과학연구소 |
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| Abstract |
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Behaviour of a thread joint of a rocket motor case show complex structural characteristics. Pre-torque must be applied to the threads to prevent the loosening of the interface from the additional pressure load. During the pressurization of the rocket motor case, the jointing face may be opened if the pre-torque were not set properly or the structure may be failed if the local concentrated stress exceeds the strength of the material. In this paper, the structural behaviour of a thread joint of a rocket motor case were analyzed by the finite element method and the results were compared to the experimental ones. A method to set a pre-torque for a thread joint were proposed to ensure the structural safety. |
| Key Words:
Thread Connection, Pre-load, Torque, Rocket Motor, Overclosure Tying |
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