Dynamic fracture of explosive bolt

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Makina Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2018

Tezin Dili: İngilizce

Öğrenci: BATUHAN GÖKÇE

Asıl Danışman (Eş Danışmanlı Tezler İçin): Hüsnü Dal

Eş Danışman: Raif Orhan Yıldırım

Özet:

In this study, dynamic fracture of the pressure type explosive bolt is established with different geometry of the piston, which is used to break the body, to enhance the reliability of the system. Before the fracture analysis of the explosive bolts, pyrotechnic combustion analysis is studied and 0-D ballistic solver is developed to simulate the performance of the initiator into the pyrotechnic, namely pressure type, explosive bolt. By using the developed model, the pressure and temperature in the expansion chamber, the position and velocity of the piston can be predicted. After prediction of these parameters, the pressure expansion is validated with closed bomb experiments. Then, three different shape piston models are developed to study on clean separation without fragmenting parts with minimum dissipated of energy during the separation of the system to get higher reliability. The varied separation behavior of these pyrotechnic explosive bolt models are analyzed and compared in LS-DYNA.