This technical brief discusses optimum design of a cold extrusion compound container. First, the formulae of stresses for each component in the container and of shrink-fit pressure are derived. Next, the fatigue strength theory of the container is described by means of the Sines’ method. Finally, mathematical models of optimum design of fatigue strength are established for monobloc, two-piece, and three-piece containers, and the following two results are obtained: (i) the maximal load capacities of two- and three-piece containers are, respectively, 1.89 and 2.04 times that of a monobloc container, and (ii) it is not necessary to design compound containers with outer radii larger than 4 times their inner radii.
Issue Section:Technical Briefs
Keywords:containers, product design, extrusion, fatigue, mechanical strength, shrink fitting, stress analysis, internal stresses
Topics:Containers, Design, Extruding, Fatigue strength, Stress, Pressure
Laue, K., and Stenger, H., 1981, Extrusion, American Society for Metals, Metals Park, Ohio.
Changshun, Yang, 1984, Cold Extrusion Technology Practice, National Defense Industry Press, Beijing.
Optimum Design of Multi-layer Composite Cylinder of Cold Extrusion Dies and High Press Pressure Containers,”
Chinese Journal of Mechanical Engineering,
Adel, S. Saada, 1974, Elasticity Theory and Applications, Pergamon, New York.
Kohmoto, Minoru, and Ishikawa, Hiroshi, and Nakagawa, Takao, 1972, Fatigue of Metal and Design, Corona, Kokyo.
Mirko, Klesnil, and Petr, Luka´sˇ, 1980, Fatigue of Metallic Materials, Elsevier Scientific, Amsterdam.
Fuchs, H. O., and Stephens, R. I., 1980, Metal Fatigue in Engineering, Wiley-Interscience, New York.
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