Simulation of three-dimensional bulk forming processes by finite element flow formulation

Alves, M.L.; Rodrigues, J.M.C.; Martins, P.A.F.

doi:10.1088/0965-0393/11/5/307

Cited by 38 publications

(18 citation statements)

References 14 publications

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“…The finite element results were obtained by means of a computer program developed by the authors [40,42,43], which was also built up under the flow formulation in order to eliminate the influence of the formulation from the comparative evaluation. The finite element computer program utilizes quadrilateral elements.…”

Section: Resultsmentioning

confidence: 99%

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On background Cells during the Analysis of Bulk Forming Processes by the Reproducing Kernel Particle Method

2006

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The reproducing kernel particle method based on the irreducible flow formulation is utilised to perform the numerical simulation of bulk metal forming processes. Emphasis is given on analysing the influence of employing triangular or quadrilateral background cells on the predictions of material flow, forming load and distribution of strain. A new proposal to smooth the distribution of average stresses during stress computations in the background cells is also included. The effectiveness of the proposed method is discussed by comparing its numerical predictions with a benchmark test case, finite element calculations and experimental data. The benchmark test case is included with the objective of illustrating the influence of several theoretical and numerical subjects such as; order of the basis correction functions, dimension of the compact support and computation of the volume associated to each nodal point. Experimental data was acquired from metal forming controlled laboratory-based tests that were designed so that the proposed method could be tested on its ability to efficiently handle large plastic deformations. It is shown that adaptive arbitrary triangular background cells are capable of efficiently handling large plastic deformations without remeshing.

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Section: Resultsmentioning

confidence: 99%

“…In some finite element [31,40] and meshless computer programs (based on the slightly compressible flow formulation [41]) [15][16][17][18][19][20], the volumetric strain-rate,ε…”

Section: Evaluation Of the Average Stressesmentioning

confidence: 99%

On background Cells during the Analysis of Bulk Forming Processes by the Reproducing Kernel Particle Method

2006

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“…Finite element results were obtained by means of the computer program I-Form2D developed at Instituto Superior Técnico [47,48]. Because the finite element program was also built up under the flow formulation it was possible to eliminate the influence of the formulation from the comparative evaluation.…”

Section: Resultsmentioning

confidence: 99%

“…The choice of the time step Dt was taken from what is commonly utilized in the context of the finite element flow formulation [46,48,49].…”

Section: Solution Proceduresmentioning

confidence: 99%

Simulation of bulk metal forming processes using the reproducing kernel particle method

Xiong

Liu

Cao

et al. 2005

Computers & Structures

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“…These operation conditions allowed numerical modelling of the compression and stack compression tests to be performed with the finite element flow formulation and enabled the authors to utilize the in-house computer program I-form that has been extensively validated against experimental measurements of metal forming processes since the end of the 80's [10].…”

Section: Finite Element Modellingmentioning

confidence: 99%

Revisiting the Fundamentals and Capabilities of the Stack Compression Test

2011

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Knowledge of the flow curve in metal forming is crucial to analyse formability, to describe strain-hardening and to set-up the non-linear constitutive equations of metal plasticity. Commonly available mechanical testing of materials supplied in the form of sheets and plates, under low loading rates, is limited to small values of strain. As a result of this, there is a generalized practice, and important source of modelling errors, of extrapolating the remaining part of the flow curves that are usually determined by means of tensile and bulge tests. The aim of this paper is to provide a new level of understanding for the stack compression test and to evaluate its capability for constructing the flow curves of metal sheets under high strains across the useful range of material testing conditions. The presentation draws from the fundamentals of the stack compression test to the assessment of its overall performance by comparing the flow curves obtained from its utilisation with those determined by means of compressive testing carried out on solid cylinder specimens of the same material. Results show that mechanical testing of materials by means of the stack compression test is capable of meeting the increasing demand of accurate and reliable flow curves for sheet metals.

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Simulation of three-dimensional bulk forming processes by finite element flow formulation

Cited by 38 publications

References 14 publications

On background Cells during the Analysis of Bulk Forming Processes by the Reproducing Kernel Particle Method

On background Cells during the Analysis of Bulk Forming Processes by the Reproducing Kernel Particle Method

Simulation of bulk metal forming processes using the reproducing kernel particle method

Revisiting the Fundamentals and Capabilities of the Stack Compression Test

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