Investigation on Early Bulge Behavior of Collision Region Driven by Detonation Waves Using Ultrahigh-Speed Framing Photography Technology

The movement state of a flyer driven by two head-on colliding detonation waves is an important problem in weapon physics, about which, up to now, experimental studies have mostly focused on the external characteristics of collision behavior in the later evolution period but, in spite of the strong correlation between the diagnosis results in the later period and the early response behavior of the collision region, relatively little has been done concerning the precise diagnosis of this behavior's early period.In this paper, such materials as W, Cu, etc., whose basic properties are already known, were selected as experiment samples, and a precise experimental diagnosis platform was built using our own developed high speed photoelectric camera.The platform was used to study the collision processes of shock waves and the response of the flyer.Deformation conditions of the flyer surface before and after the collision of the shock waves were obtained.Moreover, clear evolution images of the early bulge in the collision region of the flyer were also successfully achieved.It is expected that these results can serve as significant reference for state analysis and numerical simulation on bulge behaviors of the collision region.