The main objective of the present paper is to provide a simple analytical solution for describing expansion two-layer tube under plane-strain conditions its subsequent use in preliminary design hydroforming processes. Each layer’s constitutive equations are an arbitrary pressure-independent yield criterion, associated plastic flow rule, and hardening law. elastic portion strain neglected. metho...

The different branch diameters of five-way tube affect the design loading internal pressure in hydroforming process, where large-diameter is broken more easily than small-diameter one due to same ultimate stress material one-step forming method. Therefore, first four-way and then multi-step (FFTF) method three-way (FTTF) were proposed fabricate 5A02 aluminum alloy with two kinds avoid burst tub...

The flow behavior around a cam shaped tube in cross flow has been investigated experimentally using flow visualization and pressure distribution measurement. The range of attack angle and Reynolds number based on an equivalent circular diameter are within 0 ≤ α ≤ 360˚ and 2 x 104 < Reeq < 3.4 x 104, respectively. The pressure drag features are clarified in relation to the flow behavior around t...

The investigation into the circumferential mechanical properties of tubular materials has been receiving increasing attention, since tube hydroforming process used in forming field, because have a significant effect on hydroformability materials. In present study, method for evaluation with flaring test was proposed. expressions yield stress, strain hardening coefficient and exponent values wer...

light-weight and high strength alloys such as al-mg alloys are used in order to reduce the weight of industrial components. however these materials should be formed at elevated temperatures due to their poor formability at room temperature. hot metal gas forming is one of the high-tech forming processes that is used to solve this problem. recent investigation on tube hydroforming showed positiv...