Pulsed Power experiments under way at Los Alamos National Labs use short pulses (<5 μsec) of high current (>10~7 amps) to create a large magnetic force on the cylindrical "liner" carrying this current. As a result of this force, the liner implodes onto a target positioned at its centerline. Creating a large force on the target is the goal of the experiments. The liner is a thin-walled aluminum cylinder (thickness of 1 mm with a radius of 50 mm) captured at the ends by two copper guide planes using either press or shrink fits. The contact between the liner and glide planes is critical to the success of the experiment. The analytical challenge for investigating these components is predicting the presence of a partial shrink fit; that is, a shrink fit whose length is less than the apparent length of the interface between mating cylinders. Such stress and deformation distributions are difficult to calculate using analytical shrink fit theory because of the varying radial deflection profile along the length of the liner. A second goal is to design an initial non-cylindrical liner such that when it is assembled onto the glide planes, it will assume a cylindrical shape. This cylindrical geometry will lead to uniform implosions of the liner and are deemed to be highly beneficial for the success of the experiments.
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