Design verification and application of test method for pipe forming limit under high pressure
The common method for testing the high-pressure forming limits of pipes was introduced.Using finite element calculations,a test method of internal high-pressure pipe forming was designed and verified.It is found that the formability of the material changes after the sheet metal is processed into a pipe,with a significant decrease in the forming limit.When using high-pressure internal forming to process pipes,it is necessary to consider that the formability of the pipe is reduced compared to the sheet metal.Therefore,the subsequent machining process should be evaluated and designed based on the formability of the pipe itself.The pressure limit of the pickled SAPH400 welded pipe was tested by an internal high-pressure forming machine.
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