Acquisition and Evaluation of Theoretical Forming Limit Diagram of Al 6061-T6 in Electrohydraulic Forming Process

Woo, Min-A; Song, Woo‐Jin; Kang, Beom-Soo; Kim, Jeong

doi:10.3390/met9040401

Cited by 12 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results showed that the M-K model with J-C model is more suitable to calculate the biaxial strain limit of AA5A06 at high strain rates when compared with the Swift model. Woo et al [13] studied the electrohydraulic FLC of 6061-T6 aluminum alloy based on M-K theory and Hollomon model including strain hardening and strain rate hardening parameters. The predicted electro-hydraulic FLC is in good agreement with the experimental results.…”

Section: Introductionmentioning

confidence: 99%

Constitutive model and forming limit prediction of AA5182-O aluminium alloy sheet in electromagnetic forming

Liu

Lin

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Based on the electromagnetic hole-flanging (EMHF) experiment and numerical simulation, the inverse identifications of Johnson-Cook (J-C), Huh-Kang (H-K), Allen-Rule-Jones (A-R-J) and Cowper-Symonds (C-S) constitutive models were performed for AA5182-O aluminium alloy sheet at high strain rates. The accuracy of constitutive models was inspected by comparing the simulated height and thickness with experimental ones. The flow stress curves of AA5182-O aluminium alloy sheet at high strain rates were investigated. Based on the Marciniak-Kuczynski (M-K) model and constitutive models, the electromagnetic forming limit curves (EMFLC) of AA5182-O aluminium alloy sheet were predicted. The results show that the constitutive models at high strain rates can be determined by inverse identification on basis of EMHF. The flow stress curves at high strain rates predicted by different constitutive models are significantly distinguished. The constitutive model directly affects the numerical prediction of EMFLC. The EMFLC with J-C and A-R-J models shows little strain rate sensitivity, the EMFLC with H-K model shows positive strain rate sensitivity at a certain range of strain rate, and the EMFLC with C-S model shows significantly positive strain rate sensitivity.

show abstract

Section: Introductionmentioning

confidence: 99%

Constitutive model and forming limit prediction of AA5182-O aluminium alloy sheet in electromagnetic forming

Liu

Lin

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…This process enables aluminum alloy sheets to be accelerated to a speed of ≥100 m/s and subjected to a high strain rate of 100 s −1 . Corresponding numerical simulations have also been conducted [32,33]. Electromagnetic seam welding has also been studied, in which aluminum sheets are joined using powerful electromagnetic pulse technology [34,35] and then joined to magnesium alloys heated to 200-300 • C [36,37].…”

Section: Introductionmentioning

confidence: 99%

Study on High-Strain-Rate Deformation of Magnesium Alloy Using Underwater Shock Waves Generated by High-Voltage Electric Discharge of Thin Wire

Iyama

Yamaguchi

Nishi

et al. 2022

Metals

View full text Add to dashboard Cite

Magnesium is an abundant material with high specific strength, and its use as a structural metal is increasing. However, its properties cause difficulty in its formation at room temperature. Therefore, the objective of this study was to form a magnesium alloy at room temperature using an underwater shock wave generated by the discharge of an aluminum wire. Forming was conducted using an auxiliary plate composed of aluminum instead of magnesium alloy alone. In addition, hyperbolic and parabolic pressure vessels were employed. Numerical simulations were performed to measure the pressure values, propagation of underwater shock waves, and deformation of the magnesium alloy. Large deformation was observed when an auxiliary aluminum plate was placed on the upper surface of an AZ31 magnesium alloy plate inside the hyperbolic pressure vessel.

show abstract

“…The ductile fracture behavior of the anisotropic 7050-T7451 aluminum alloy plate was investigated, and a novel damage model was proposed to predict the fracture behavior of anisotropic materials [32]. In addition, the theoretical forming limit diagram (FLD) of Al 6061-T6 was acquired and evaluated in an electrohydraulic forming process [33]. The physical model and numerical simulation of a deep drawing process for a box-shaped product were developed, and the best combination of yield locus and hardening law was determined [34].…”

Section: Introductionmentioning

confidence: 99%

Aluminum Alloy Sheet-Forming Limit Curve Prediction Based on Original Measured Stress–Strain Data and Its Application in Stretch-Forming Process

Sun

Cai

et al. 2019

Metals

View full text Add to dashboard Cite

A new method, by directly utilizing original measured data (OMD) of the stress–strain relation in the Marciniak–Kuczynski (M–K) model, was proposed to predict the forming limit curve (FLC) of an aluminum alloy sheet. In the groove zone of the M–K model, by establishing the relations of the equivalent strain increment, the ratio of shear stress to the first principle stress and the ratio of the second principle stress to the first principle stress, the iterative formula was established and solved. The equations of theoretical forming limits were derived in detail by using the OMD of the stress–strain relation. The stretching specimens of aluminum alloy 6016-T4 were tested and the true stress–strain curve of the material was obtained. Based on the numerical simulations of punch-stretch tests, the optimized specimens’ shape and test scheme were determined, and the tests for FLC were carried out. The FLC predicted by the proposed method was more consistent with the experimental results of FLC by comparing the theoretical FLCs based on OMD of the stress–strain relation and of that based on traditional power function. In addition, the influences of anisotropic parameter and groove angle on FLCs were analyzed. Finally, the FLC calculated by the proposed method was applied to analyze sheet formability in the stretch-forming process, and the predicted results of FLC were verified by numerical simulations and experiments. The fracture tendency of the formed parts can be visualized in the forming limit diagram (FLD), which has certain guiding significance for fracture judgment in the sheet-forming process.

show abstract

Acquisition and Evaluation of Theoretical Forming Limit Diagram of Al 6061-T6 in Electrohydraulic Forming Process

Cited by 12 publications

References 26 publications

Constitutive model and forming limit prediction of AA5182-O aluminium alloy sheet in electromagnetic forming

Constitutive model and forming limit prediction of AA5182-O aluminium alloy sheet in electromagnetic forming

Study on High-Strain-Rate Deformation of Magnesium Alloy Using Underwater Shock Waves Generated by High-Voltage Electric Discharge of Thin Wire

Aluminum Alloy Sheet-Forming Limit Curve Prediction Based on Original Measured Stress–Strain Data and Its Application in Stretch-Forming Process

Contact Info

Product

Resources

About