A study on material modeling to predict spring-back in V-bending of AZ31 magnesium alloy sheet at various temperatures

Nguyen, Duc-Toan; Yang, Sheng; Jung, Dong-Won; Banh, Tien–Long; Kim, Young-Suk

doi:10.1007/s00170-011-3828-y

Cited by 37 publications

(14 citation statements)

References 13 publications

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“…plasticity deformation and its strength increases as a result of the tensile phenomenon. Some similar results for o ther steel and alloy material could be referred[1,6,[26][27][28][29].…”

supporting

confidence: 62%

“…As shown in figure 10, isotropic hardening law overestimated the hardening component by missing the Bauschinger effect and transient behavior; and kinematic hardening law underestimates the hardening of material and exaggerates the Bauschinger effect after reverse loading occurrence. The comparisons To overcome and improve the accuracy of spring back predictions, various studies proposed some new equations and complicated methods to determ ine new parameters of hardening models [3,5,6,20,22]. This study developed a simplified and effective method to accurately predict V-bending by using combined harden ing model as shown in equation (10)…”

Section: V-bending Simulationmentioning

confidence: 99%

“…Spring-back is the recovery of the elastic part of the plastic deformation after removal of the external load that is applied during the bending operation; this phenomenon is a key factor of inaccuracies in bending process [2]. There are various studies have focused on Spring-back calculation [3][4][5][6][7][8][9], however, a universal solution has still not been found [10]. The previous studies indicate the complex nature of Springback, depending on the behavior of material and process parameters.…”

Section: Introductionmentioning

confidence: 99%

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A study on experiment and simulation to predict the spring-back of SS400 steel sheet in large radius of V-bending process

Hai

Minh

Nguyen

2020

Mater. Res. Express

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The spring-back phenomenon is one of the key problems in sheet metal forming process, especially with a complex shape. In this paper, the experiments of spring back have been first carried out to study the effect of punch strokes (different bending angles) on the spring-back angle for 6 (mm) thickness of SS400 sheet steel by V-bending process. The experimental results are then validated by finite element analysis (FEA) of ABAQUS software. To simulate spring-back of V-bending, deformed results of V-shape from a dynamic forming simulation in Abaqus/Explicit would be imported into Abaqus/ Standard, and then a static analysis will calculate the spring-back of V-bending. Simulation studies have shown that there are different variations in the initial bending angle and the spring-back angle after the removal of the bending force based on isotropic and kinematic hardening models. Therefore, the combined hardening model has been proposed to overcome the mismatch between prediction results and the corresponding experiments. Based on the accuracy of FEM simulation, this study also verifies the effect of parameters such as a thickness of the sheet, punch radius and punch stroke on the spring-back angle in order to select the optimum input parameters by using Taguchi method.

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“…plasticity deformation and its strength increases as a result of the tensile phenomenon. Some similar results for o ther steel and alloy material could be referred[1,6,[26][27][28][29].…”

supporting

confidence: 62%

Section: V-bending Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A study on experiment and simulation to predict the spring-back of SS400 steel sheet in large radius of V-bending process

Hai

Minh

Nguyen

2020

Mater. Res. Express

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“…25,26 The spring-back is due to the elastic component of the strain created in part, which can negatively affect the dimensional accuracy of the part after the unloading process. 27 In order to achieve the desired dimensions in the finished product and simplicity in assembly, solutions to reduce this phenomenon in the forming processes should be considered, the sheet-forming process being influenced by a combination of bending, tensile loading, and unloading. Therefore, this phenomenon is of particular complexity.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of spring-back phenomenon through an L-die bending process for multilayered sheets produced by the accumulative press bonding technique

Etemadi

Rahmatabadi

Hosseini

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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For the first time in this study, the accumulative press bonding method was used to fabricate layer composites, including ceramic powder and metallic layers, and the spring-back as a functional plasticity test experimentally investigated. Al/Cu and Al/Cu/Al2O3 composites were successfully manufactured in five accumulative press bonding cycles, and in addition to spring-back evaluation, mechanical properties and plastic instability were investigated. The results showed that by the end of the third cycle, both composites were fully layered structure. However, in the fifth cycle in the Al/Cu/Al2O3 composite, plastic instability intensified and necking and fracture at all Cu layers observed due to the presence of particles in the interface and further differences in mechanical properties. As the number of accumulative press bonding cycles increases, the number of Al/Cu interfaces, which are the places where the reinforcement particles are dispersed, increases, thereby significantly improving the particle distribution and mechanical properties. The mechanical properties were improved by increasing the applied strain to the two composites, mainly due to the mechanisms underlying the severe plastic deformation processes, including cold working and microstructure improvement. The mechanical properties of the composite containing reinforcing particles improved the tensile strength and microhardness of both layers in all accumulative press bonding cycles, although the amount of elongation decreased slightly. The maximum tensile strength values of the two composites were obtained at the end of the fifth cycle, which improved the tensile strength for Al/Cu and Al/Cu/Al2O3 by about 2.65 and 2.42 times higher than unprocessed Al matrix, respectively. Experimental results of the spring-back evaluation showed that the composite with reinforcement powder due to the higher Young’s modulus had lower spring-back value. The amount of spring-back in both composites decreased with almost the same rate as the applied strain increased.

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“…Magnesium alloys are di cult to process at room temperature and generally require heating [1,2]. To overcome these challenges, a few forming processes have been conducted to address those issues.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Deformation Characteristics of AZ31B Friction Heating Incremental Forming

Wang¹,

Zhou²,

2020

Preprint

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A friction heating incremental forming (FHIF) is proposed, which does not require external heating. By means of orthogonal experimental, finite element analysis and CATIA reverse engineering methods, the forming characteristics of magnesium alloy AZ31B FHIF are studied, such as forming limit angle, dimensional accuracy, thickness distribution, equivalent stress and equivalent strain at different forming stages. The results show that: For the FHIF, the forming limit angle can be up to 76°, and the most obvious way to increase the forming limit angle is to increase the spindle speed. In the FHIF, due to the limitations of the experimental conditions, it will be different from the ideal model. The bending phenomenon first occurs in the early stage of forming, which makes the upper corner part the worst accuracy, and the lower corner part obvious defects. Compared with the theoretically stable thickness, the actual part sidewall is thinned by 11%. The simulation successfully predicts and observes the thickness change and stress-strain change trend of the entire FHIF.

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A study on material modeling to predict spring-back in V-bending of AZ31 magnesium alloy sheet at various temperatures

Cited by 37 publications

References 13 publications

A study on experiment and simulation to predict the spring-back of SS400 steel sheet in large radius of V-bending process

A study on experiment and simulation to predict the spring-back of SS400 steel sheet in large radius of V-bending process

Experimental investigation of spring-back phenomenon through an L-die bending process for multilayered sheets produced by the accumulative press bonding technique

Analysis of Deformation Characteristics of AZ31B Friction Heating Incremental Forming

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