Numerical simulation for creep age forming of aluminium alloy 7050 saddle-shaped part

The uniformity of temperature field distribution in creep aging process is very important to the forming accuracy of components. In this paper, the temperature field distribution of 2219 aluminum alloy tank cover during aging forming is simulated by using the finite element software FLUENT, and a two-stage heating process is proposed to reduce the temperature field distribution heterogeneity. The results show that the temperature difference of the tank cover is large in the single-stage heating process, and the maximum temperature difference is above 27°C,which seriously affects the forming accuracy of the tank cover. With two-stage heating process, the temperature difference in the first stage has almost no direct impact on the forming accuracy of the top cover. In the second stage, the temperature difference of the tank cover is controlled within 10°C, compared with the single-stage heating, the maximum temperature difference is reduced by more than 17°C. The two-stage heating effectively reduces the heterogeneity of the temperature field of the top cover. The research provides technical support for the precise thermal mechanical coupling of large-scale creep aging forming components.

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“…After the mold surface is compensated for springback, the forming accuracy of the component is basically not affected. [7].…”

Section: Characteristics Of Materials Autoclaves and Toolsmentioning

confidence: 99%

Simulation and Optimization of Temperature Field of Tank Cover with Super Large Diameter during the Creep Aging Forming Process

Gao

Zhan

Liao

et al. 2021

SSP

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“…Luo et al [19] formed an Al-Li stiffened panel with complex structure features and their FE model showed that plastic and creep deformation played an equivalent role in determining springback of the stiffened panel. Stiffeners have been shown to play a key role in springback percentage and mechanical properties of formed products after CAF [20]. However detailed effect of stiffener geometry on CAF process, which is important for stiffened plate design, has rarely been reported.…”

Section: Introductionmentioning

confidence: 99%

An investigation of creep age forming of AA7B04 stiffened plates: Experiment and FE modelling

Lyu

Huang

et al. 2019

Journal of Manufacturing Processes

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Creep age forming (CAF) of aluminium alloy 7B04 (AA7B04) stiffened plates has been experimentally and numerically investigated in this study. Creep-ageing experiments of AA7B04-T651 were conducted under different tensile stress levels at 140 °C for up to 20 h, and a set of unified constitutive equations was calibrated based on the experimental results of the evolutions of creep strain, yield strength and precipitate size, which was implemented into ABAQUS for CAF process modelling. CAF experiments and corresponding simulations of AA7B04 stiffened plates were then carried out and the effect of stiffener height and die radius on springback and yield strength was studied. It was found that the springback percentage decreases with increasing stiffener height and decreasing forming die radius, and the yield strength is slightly lower in the stiffener than in the skin of the CAFed stiffened plates due to stress effect on ageing progression. A good agreement has been achieved between experimental and corresponding FE results, with maximum deviations of 6.7% and 3.3% respectively for springback and yield strength.

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A Microstructural Based Unified Model for Creep-Ageing Behaviour of Aluminium Alloy Under Various Thermal Conditions

Li,

Hou,

Gao

et al. 2023

Lecture Notes in Mechanical Engineering

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Numerical simulation for creep age forming of aluminium alloy 7050 saddle-shaped part

Cited by 5 publications

References 6 publications

Simulation and Optimization of Temperature Field of Tank Cover with Super Large Diameter during the Creep Aging Forming Process

Simulation and Optimization of Temperature Field of Tank Cover with Super Large Diameter during the Creep Aging Forming Process

An investigation of creep age forming of AA7B04 stiffened plates: Experiment and FE modelling

A Microstructural Based Unified Model for Creep-Ageing Behaviour of Aluminium Alloy Under Various Thermal Conditions

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