Abstract
Structural integrity evaluation of military systems is vital in such applications as rocket launchers. In safe life design, for a certain operational life the system is ensured to function well and no failure would occur even in the presence of some imperfections or flaws. This paper considers the fracture analysis as part of the safe life design approach that is used in the design of a rocket launcher. A methodology based on sub modelling technique is introduced. It was made sure that unstable crack growth would not occur upto certain crack sizes. Subsequently, after actual manufacturing of the launcher, critical locations of welds in the system were checked for presence of any cracks after repeated firing loads. After these controls no cracks were detected due to operational conditions until the time when this document was prepared.
Highlights
Multi barrel rocket launchers contain multiple rockets and are used for artillery support in the army
Rocket launcher systems, which are unguided are used to cover a certain region by heavy artillery fire instead of single accurate shots
The launcher systems are needed to be used many times in the field, the system is subjected to repetitive loading
Summary
Multi barrel rocket launchers contain multiple rockets and are used for artillery support in the army. They are usually agile and need little preparation time for firing. The launchers can be used with both guided and unguided munitions. Rocket launcher systems, which are unguided are used to cover a certain region by heavy artillery fire instead of single accurate shots. The launcher systems are needed to be used many times in the field, the system is subjected to repetitive loading. It is crucial to determine the loads on the system very accurately and to evaluate the structural integrity precisely
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