Tubular hydroforming provides a number of advantages over conventional stamping processes, including reduc- tion in part counts and weight reduction, improved strength and stiffness of structural components, lower tooling costs, and higher dimensional accuracy. In order to provide hydroforming guidelines for product designers and process engineers, and to obtain fundamental under- standings of such forming process, we begin a series of study on failure analysis of tubular hydroforming under internal pressure and end feeding.
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