Investigation and numerical analysis of impulsive hydroforming of aluminum 6061-T6 tube

Hajializadeh, Farshid; Mashhadi, Mahmoud Mosavi

doi:10.1016/j.jmapro.2015.06.027

Cited by 37 publications

(10 citation statements)

References 19 publications

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“…The impactor and the fixture were created separately using a 4-node 3D rigid triangular facet element (R3D4). The mechanical behavior of the aluminum alloy sheet was simulated by the Johnson-Cook structural model and relevant constants of Al6061-T6 are shown in Table 2 [33][34][35]. The model is expressed as follows:…”

Section: Finite Element Modelsmentioning

confidence: 99%

Low-Velocity Impact Resistance of Al/Gf/PP Laminates with Different Interface Performance

Lin

Zhang

et al. 2021

Polymers

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The weak interface performance between metal and composite (IPMC) makes the composite materials susceptible to impact load. Aluminum/glass fiber/polypropylene (Al/Gf/PP) laminates were manufactured with the aluminum alloy sheets modified by nitrogen plasma surface treatment and the phosphoric acid anodizing method, respectively. FEM models of Al/Gf/PP laminates under low-velocity impact were established in ABAQUS/Explicit based on the generated data including the model I and II interlaminar fracture toughness. Low-velocity impact tests were performed to investigate the impact resistance of Al/Gf/PP laminates including load traces, failure mechanism, and energy absorption. The results showed that delamination was the main failure mode of two kinds of laminates under the impact energy of 20 J and 30 J. When the impact energy was between 40 J and 50 J, there were metal cracks on the rear surface of the plasma pretreated specimens, which possessed higher energy absorption and impact resistance, although the integrity of the laminates could not be preserved. Since the residual compressive stress was generated during the cooling process, the laminates were more susceptible to stretching rather than delamination. For impact energy (60 J) causing the through-the-thickness crack of two kinds of laminates, plasma pretreated specimens exhibited higher SEA values close to 9 Jm2/kg due to better IPMC. Combined with the FEM simulation results, the interface played a role in stress transmission and specimens with better IPMC enabled the laminates to absorb more energy.

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Section: Finite Element Modelsmentioning

confidence: 99%

Low-Velocity Impact Resistance of Al/Gf/PP Laminates with Different Interface Performance

Lin

Zhang

et al. 2021

Polymers

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“…Chen et al conducted numerical simulations for impact hydroforming of AA 2B06-O sheet by fluid structure interaction (FSI) method with LS-DYNA [20] . Hajializadeh et al simulated the impulsive hydroforming process of Al6061-T6 tube with the Coupled Eulerian Lagrangian (CEL) method by Abaqus [21] . Above simulation strategies for dynamic loading all provide positive instructions to the simulation strategy for IHF in this work.…”

Section: Introductionmentioning

confidence: 99%

Springback inhibition of Ti-6Al-4V sheet with impact hydroforming at room temperature

Chen

et al. 2022

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

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Springback is a tough issue in sheet forming, and always leads to dimensional inaccuracy of formed parts. Titanium alloy selected as desired light-weight alloy has been playing significant roles in aerospace industry because of its good comprehensive performance. Whereas, titanium alloy components manufactured always exhibit severe springback at room temperature, which greatly restrict their application. To explore the possibility of reducing springback, rectangular lath-shaped parts with Ti-6Al-4V alloy sheet were fabricated by impact hydroforming (IHF) with self-designed equipment. Consequently, much lower springback is obtained using IHF with high strain rate than that formed by conventional stretch-bending with low strain rate. Great efforts are paid to clarify the mechanism of springback restriction under IHF. Different from traditional forming methods, more complex and high-speed interaction behavior between liquid and Ti-6Al-4V alloy sheet occurs. It considerably increases the difficulty for analyzing the deformation process of sheet under IHF. Thus, a novel solid-liquid coupling numerical simulation technology for IHF was developed. To validate the simulation accuracy, experiments with different forming processes and parameters were performed. Given the combined analysis of experimental and simulation results, it is found that distinctive forming paths are introduced between stretch-bending and IHF. Specifically, the preferred deformation region of sheet transfers from middle region for conventional stretch-bending to end regions under IHF, which mainly attributes to the unique loading behavior of liquid at high strain rate.

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“…In this method, the electrical discharge energy is released between two electrodes and evaporates the liquid between two electrodes submerged in the liquid medium. It results in generation of plasma channel that expands promptly leading to formation of the outgoing shock wave and pulse waves that encounter with the workpiece and apply pressure on it [1].…”

Section: Introductionmentioning

confidence: 99%

Evaluation and optimization of effective parameters in electrohydraulic forming process

Zohoor

Mousavi

2018

J Braz. Soc. Mech. Sci. Eng.

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Electrohydraulic forming (EHF) method is used extensively in industrial applications for its high capacity in improving the formability of various sheet metals. EHF is a high-velocity sheet metal forming process in which two electrodes are positioned in a water-filled chamber and a high-voltage discharge between the electrodes generates a high pressure to form the sheet metal. The EHF method contains innate complexity and depends on different parameters. Then, it is essential to investigate the process thoroughly and present the experiment procedure in such a way that an optimum condition can be met. In the present study, the effective parameters of the EHF (with and without using bridge wire) on free forming of circular Brass 260 sheets are analyzed by employing the design of experiment technique. Numerous experimental tests are performed, and the process parameters are optimized implementing response surface methodology and Minitab software. The most affective parameters were determined by analysis of variance method. Based on the results for EHF without using wire, it can be stated that maximum dome height is obtained when discharge energy is maximum and other two factors (stand-off distance and electrode diameter) are minimum. There also exists an optimum amount of electrode gap determined according to the process conditions. In case of EHF using wire, it was found that the aluminum wire was more efficient than copper and tungsten. Also, there are optimum values for the length and diameter of bridge wire that depended on the experimental conditions.

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Investigation and numerical analysis of impulsive hydroforming of aluminum 6061-T6 tube

Cited by 37 publications

References 19 publications

Low-Velocity Impact Resistance of Al/Gf/PP Laminates with Different Interface Performance

Low-Velocity Impact Resistance of Al/Gf/PP Laminates with Different Interface Performance

Springback inhibition of Ti-6Al-4V sheet with impact hydroforming at room temperature

Evaluation and optimization of effective parameters in electrohydraulic forming process

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