A fast algorithm for strain prediction in tube hydroforming based on one-step inverse approach

Chebbah, M. S.; Naceur, Hakim; Gakwaya, A.

doi:10.1016/j.jmatprotec.2011.06.012

Cited by 8 publications

(1 citation statement)

References 28 publications

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“…9–11 Other scholars used numerical simulation methods to study the causes of failures such as necking and cracking in hydroforming. 12–14 T.F.Kong et al. 15 (2019) studied the problem that tube hydroforming magnesium alloy is prone to wrinkling when the tube end and the axial feed zones are overheated.…”

Section: Introductionmentioning

confidence: 99%

External high-pressure forming of metal spiral tube of equal wall thickness

Shi

Deng

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Positive displacement motors are widely used underground power tools in oil and gas extraction. In order to solve the problems of the short life of the conventional positive displacement motor and the difficulty of machining the constant wall positive displacement motor, this paper proposes a metal bush stator. Based on theoretical analysis and tensile experiment of 304 stainless steel, a finite element model of an external high-pressure forming equal-wall-thickness metal spiral tube was established. The finite element method is used to study the external high pressure forming spiral tube with equal wall thickness. According to the results of the numerical simulation, we choose the tube blank with the inner diameter of 88 mm×the wall thickness of 3 mm for the experiment of external high pressure forming spiral tube. The result of the experiment is that the inner and outer surfaces of the metal spiral tube are smooth, and the spiral tube has no wrinkles or cracks. The maximum gap between the spiral tube and the mold is 0.12 mm, and the inner surface of the spiral tube is close to the mold. The maximum gap are at the transition of convex arc and concave arc. The minimum wall thickness and the maximum wall thickness of the spiral tube are 2.6 mm and 3.205 mm, respectively. The quality of the spiral tube is better when the inner circumference length of the tube (D2)/the contour line circumference (D1) of the mold is 0.974. The experimental results are in good agreement with the numerical simulation results. We have designed an assembled mold, which can be removed smoothly after the experiment. The research results of this paper have important engineering significance for improving the working performance of positive displacement motors.

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Section: Introductionmentioning

confidence: 99%

External high-pressure forming of metal spiral tube of equal wall thickness

Shi

Deng

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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Damage Prediction in Metal Forming Process Modeling and Optimization: Simplified Approaches

Guo¹,

Li²,

Abbès³

et al. 2014

Handbook of Damage Mechanics

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Damage Prediction in Metal Forming Process Modeling and Optimization: Simplified Approaches

Guo¹,

Li²,

Abbès³

et al. 2013

Handbook of Damage Mechanics

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Some simplified numerical methods for damage predictions in metal forming process modeling and optimization are presented in this chapter. The incremental approaches including advanced damage models lead to accurate results, but the simulations are tedious and time-consuming. An efficient solving algorithm called inverse approach (IA) allows the fast modeling of forming processes in only one step between the known final part and the initial blank, avoiding the contact treatment and the incremental plastic integration. To improve the stress estimation in the IA, the so-called pseudoinverse approach (PIA) has been developed. Some intermediate configurations are geometrically created and corrected by a free surface method to consider the deformation path, and the plastic integration based on the flow theory is carried out incrementally to consider the loading history. A simplified 3D strain-based damage model is coupled with the plasticity and implemented into a direct scalar integration algorithm of plasticity (without local iterations), which makes the plastic integration very fast and robust even for very large strain increments. These simplified approaches lead to very fast and useful numerical tools in the preliminary design and optimization.

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A fast algorithm for strain prediction in tube hydroforming based on one-step inverse approach

Cited by 8 publications

References 28 publications

External high-pressure forming of metal spiral tube of equal wall thickness

External high-pressure forming of metal spiral tube of equal wall thickness

Damage Prediction in Metal Forming Process Modeling and Optimization: Simplified Approaches

Damage Prediction in Metal Forming Process Modeling and Optimization: Simplified Approaches

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