Numerical Simulation Research Of Copper-tube Linear Shaped Charge Cutter

Linear shaped charge (LSC) can be described as plane symmetric shaped charge, its liner isa wedge. When the liner is impacted by the high temperature and pressure of detonationproducts, the metal of its inner wall is pushed into a metal jet flowing in a high speed to thebottom of the charge in the symmetry plane until it touches the target and cuts it. Becauselinear shaped charge involve in some complex mechanical problems such as explosion ofexplosives, material formed in the high temperature, pressure and strain rate, which is difficultto describe by the traditional mechanical formula. So the study of linear shaped charge basedon experiments mainly in the past. With the development of computer technology andnumerical analysis methods, numerical simulation is becoming an important method ofresearching shaped charge.The material of liner and crust is T2 copper, and charges with low density RDX in thiscutter. Advantages like small size, carrying conveniently, excellent effect and high speed tocut target plate exist in copper-tube linear shaped cutter, which is applied mainly toself-destruct system and the separation devices in missiles and space shuttle like the escapecapsule. So the research of LSC has an important significance to the development ofaerospace industry.Research progress and basic theory of shaped charge are introduced briefly, andANSYS/LS-DYNA software is selected and applied to simulate the copper-tube cutter cuttingtarget. The whole process of the shaped charge jet penetrating target is illustrated detailedrelatively. The influence on penetration results is researched primarily by the change of linerangel, wall thickness of shaped charge liner, length of generatrix and standoff. The best matchof parameters and the optimal effect of cutter are analyzed by orthogonal optimization. Thecutter is studied by theory and simulation and the results show that the design is reasonable and correct and have some reference value for the future. At last, the influence on penetrationresults is analyzed by different ways of initiation and the conclusions that the best initiationway is edge on the line initiation are obtained. At the same time, analogue rate is proved to beconformed in the process of copper-tube linear shaped cutter penetrating target throughtheoretical analysis and numerical simulation.