Profiled Thin-walled Tank Pressure Bulging Numerical Simulation

Bulging shaped can by pneumatic pressure is a kind of advanced process technology, apt to lower costs, simply process , lighten weight, and without residue corrode. It has get a flying development and application in recent years . Mechanism and mechanics in this paper has been detailed. Through elaborating the sheet metal forming numerical simulation technology, the key parameter that suit technology of numerical simulation of shaped can bulging by pneumatic pressure is been summarized. And turn the engineering stress-strain curve of the parameters into the true stress-strain curve. Sheet metal forming software is adopted to simulate the processing of shaped can bulging by pneumatic pressure, and the purpose is to offer the guidance for the production processing and mold designing in theory.The main contents of this paper include following parts:1. Gets the critical loads of A ,B style can made of T2BA,T2.5BA,T3 and T4CA by theoretical computing and numerical simulation, which offer theoretical foundation for selecting the economical superpressure equipment ;2. The effect of shaped can wall thickness changing on limit of bulge forming is discussed; 3. The effect of bulge coefficient on forming of five kinds of shaped can which similar to Model B have been analyzed by simulation;4. Through making simulation analysis of three kinds of shaped can similar to Model A can, we have studied the thickness distributed of the wall according to the coefficient of friction changing;5. It is analysed that the forming load change and the forming load velocity change which influence elimination of the fold and thickness of the wall in course of taking shape;6. Summarized the effect of the changing radius of transition round of the two protruding junction on the thickness distributed of the wall, by simulation of two kinds of shaped can (materials: T3) which similar to Model B.