Abstract
This paper describes the degradation of launch performance caused by the remnants of a missile canister cover with a sabot interface, on interference with adjacent structures. First, by including the material plastic behavior and element deletion, we predict interference between the structures and the detached part, followed by excessive deformation. Second, we verify that the support ring deformation, which is induced by an interaction with the cover remains, increases for fastener separations with abnormal fastener installations. This increase further triggers interference with the boosters on the bottom of a missile. Lastly, we analyze the variation of material property in a high-speed environment.
Highlights
A missile canister protects the missile from foreign matter inflow, shock vibration, and weather such as rain and snow, and facilitates smooth ejection at launch
If the missile canister cover fails to rupture at a missile launch, it could possibly interfere with the adjacent structure
The missile canister cover, which is made of urethane foam, is ruptured by the propellant ignition impact pressure formed inside the missile canister and is removed
Summary
A missile canister protects the missile from foreign matter inflow, shock vibration, and weather such as rain and snow, and facilitates smooth ejection at launch. If the missile canister cover fails to rupture at a missile launch, it could possibly interfere with the adjacent structure. The missile canister cover, which is made of urethane foam, is ruptured by the propellant ignition impact pressure formed inside the missile canister and is removed. J. et al [2] performed the first structural analysis and validation test for the rupture-type canister cover. The aforementioned studies did not recognize that cover remnants caused by improper manufacturing or insufficient internal pressure build-up may affect other components inside the canister owing to mutual collisions or contact with each other. [5] demonstrated that the general form of the strain–stress curve for polymeric foam has both plateau and densification processes, unlike metals.
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