Finite element analysis of incrementally formed parts

Sena, J.I.V.; Valente, R. A. F.; Grácio, J.; Simões, Fábio J.P.; Sousa, Ricardo J. Alves de

doi:10.1504/ijmms.2011.043082

Cited by 5 publications

(8 citation statements)

References 8 publications

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“…Figure 6 shows the elements where the stress field was evaluated. In the work of Sena et al [8], an analysis of the normal stress components ( 22 11 33 , , σ σ σ ) was performed showing that the major deformation mechanisms are bending and stretch, confirming the results of Emmens and van den Boogaard [10]. Now, attention will be focus on shear stress components.…”

Section: Numerical Simulationsupporting

confidence: 54%

“…Comparing the shear stress results of this work with the normal stress components presented in [8], it can be seen that the level of normal stresses are more significant than the shear stress.…”

Section: Numerical Simulationmentioning

confidence: 77%

“…In the work of Sena et al [8], it was shown ( Figure 4) that simulations with four layers in thickness direction and using the C3D8I ABAQUS finite element [9] give the best results for the line test example, concerning force prediction. The friction coefficient between the tool and the sheet is assumed to be equal to 0.05 and also was considered isotropic hardening.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…As can be seen the shear stress states in both layers along the sheet thickness have a similar behaviour. However, along the tool displacement region, the shear stress is insignificant compared to normal stresses [8] excepting the zone of indentation where the shear stress has relevance. Common to all the three shear stress components analysed, it is verified an opposite behaviour between the top and bottom sections along the sheet thickness.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…In the simulation of line tests with solid finite elements from ABAQUS, it was necessary to increase the layers number to increase the number of integration points in thickness direction [8]. With RESS (solid-shell element) [11] it is possible to have unlimited number of integration points in a single layer.…”

Section: Numerical Simulation With Ressmentioning

confidence: 99%

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Single point incremental forming simulation with an enhanced assumed strain solid-shell finite element formulation

2010

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Incremental sheet forming technology is nowadays a promising process to produce small batch components, with a growing potential application into the field of rapid prototyping, part's customization or biomechanics. Doing so, its major features are the low cost, relative simplicity and flexible implementation for complex deep-drowned parts, when compared to well-established sheet metal forming technologies. Nevertheless, although many experimental and numerical studies have being carried out recently, the low speed of production and low dimensional precision are still the main obstacles in the application of this technique. The present work concerns and is focused on a preliminary numerical study of some of the issues raised in the numerical simulation of single point incremental forming processes (SPIF) by means of the Finite Element Method. To do so, simulation of well-known SPIF benchmark is carried out, based on solid and solid-shell finite element formulations, along with implicit integration schemes. Comparisons are made between several types of threedimensional finite elements formulations as well as analyzing the influence of the number of through-thickness layers adopted. Furthermore, solid-shell finite element formulations based on the enhanced assumed strain method are also taken into account, allowing for models with just one layer of finite elements but including a variable number of integration points along the thickness direction. The obtained results are compared with experimental values.

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Section: Numerical Simulationsupporting

confidence: 54%

Section: Numerical Simulationmentioning

confidence: 77%

Section: Numerical Simulationmentioning

confidence: 99%

Section: Numerical Simulationmentioning

confidence: 99%

Section: Numerical Simulation With Ressmentioning

confidence: 99%

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Single point incremental forming simulation with an enhanced assumed strain solid-shell finite element formulation

2010

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Prediction and control of pillow defect in single point incremental forming using numerical simulations

et al. 2016

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On the use of EAS solid‐shell formulations in the numerical simulation of incremental forming processes

Sena

Sousa

Valente

2011

Engineering Computations

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Purpose -Incremental sheet forming represents a promising process in the manufacturing of metallic components, particularly its variant known as single point incremental forming (SPIF). The purpose of this paper is to test and validate the results coming from numerical simulation of SPIF processes using the reduced enhanced solid-shell formulation, when compared to the solid finite elements available in ABAQUS software. The use of SPIF techniques in the production of small batch components has a potential wide application in fields such as rapid prototyping and biomechanical devices. Design/methodology/approach -Incremental forming processes differ from conventional stamping by not using a press and by requiring a lower number of tools, since no dedicated punches and dies are necessary, which lowers the overall production costs. In addition, it shows relative simplicity and flexible setup for complex parts, when compared with conventional technologies. However, the low speed of production and low-dimensional accuracy levels are still the main obstacles for a wider application of this technique in the context of large production batches. Findings -In this sense, the use of numerical simulation tools based on the finite element method (FEM) can provide a better understanding of the process' peculiarities. However, there are differences on using distinct finite element formulations, regarding accuracy as well as CPU times during simulations, which can be prohibitive in some cases. Originality/value -Aiming to provide sounding improvements in these two fields (robustness and cost effectiveness of FEM solutions), the present work encloses a preliminary study about some relevant parameters in the FEM simulation of SPIF. Special focus is given to the use of solid-shell and solid finite elements, for the sake of generality in modelling, as well as implicit solution schemes for the sake of accuracy. Finally, results coming from both experimental data and commercial FEM packages are compared to those obtained by a reliable and cost-effective solid-shell finite element formulation developed and implemented by the authors.

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Finite element analysis of incrementally formed parts

Cited by 5 publications

References 8 publications

Single point incremental forming simulation with an enhanced assumed strain solid-shell finite element formulation

Single point incremental forming simulation with an enhanced assumed strain solid-shell finite element formulation

Prediction and control of pillow defect in single point incremental forming using numerical simulations

On the use of EAS solid‐shell formulations in the numerical simulation of incremental forming processes

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