Sheet metal forming analysis of planar anisotropic materials by a modified membrane finite element method with bending effect

Choi, TH; Huh, Hoon

doi:10.1016/s0924-0136(99)00050-3

Cited by 9 publications

(9 citation statements)

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“…The other process parameters are: (i) blank-holder force F b = 20.0 kN and (ii) coefficient of friction µ = 0.17 [14]. Figure 2 shows the comparison of the predicted punch load variation (with punch displacement) with the experimental data [14]. There seems to be a reasonably good agreement between the two.…”

Section: Validationmentioning

confidence: 77%

“…The geometric dimensions used in the circular cup drawing experiment are: blank diameter = 110 mm, blank thickness = 0.74 mm, punch diameter = 50 mm, die opening diameter = 52.5 mm, die profile radius = 8 mm, punch profile radius = 8 mm [14]. The material used is Aluminum-killed steel [14] with Young's modulus = 200 GPa, Poisson's ratio = 0.3, Yield strength ((σ y ) 0 ) = 162 MPa, Stress-strain curve: σ y = 562(0.00941 + ε pL eq ) 0.266 (stress in MPa). The other process parameters are: (i) blank-holder force F b = 20.0 kN and (ii) coefficient of friction µ = 0.17 [14].…”

Section: Validationmentioning

confidence: 99%

“…The material used is Aluminum-killed steel [14] with Young's modulus = 200 GPa, Poisson's ratio = 0.3, Yield strength ((σ y ) 0 ) = 162 MPa, Stress-strain curve: σ y = 562(0.00941 + ε pL eq ) 0.266 (stress in MPa). The other process parameters are: (i) blank-holder force F b = 20.0 kN and (ii) coefficient of friction µ = 0.17 [14]. Figure 2 shows the comparison of the predicted punch load variation (with punch displacement) with the experimental data [14].…”

Section: Validationmentioning

confidence: 99%

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Numerical simulation of fracture in cup drawing

2010

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Prediction of the initiation of ductile fracture in deep drawing allows a prior modification of the process which can result in a defect-free final product. This paper deals with the prediction of fracture initiation in deep drawn cup using Lemaitre's continuum damage mechanics model. The damage is incorporated in the constitutive equation through the principle of strain equivalence. The damage is evaluated using the damage growth law proposed by Lemaitre. An in-house 3D finite element formulation is employed for the analysis. Finite element formulation is based on updated Lagrangian approach. Logarithmic strain measure is used. The incremental stress is made objective by evaluating it in a frame rotating with the material particle. The material is assumed to be elasto-plastic with isotropic strain hardening using von Mises yield criterion. Modified Newton-Raphson iterative technique is used to solve the nonlinear incremental equations. The fracture location predicted by the present formulation is in agreement with the results reported in the literature.

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Section: Validationmentioning

confidence: 77%

Section: Validationmentioning

confidence: 99%

Section: Validationmentioning

confidence: 99%

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Numerical simulation of fracture in cup drawing

2010

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“…The deep drawing of a square cup, initially proposed in Numisheet'93 conference (Makinouchi et al, 1993), is considered here to further assess the performance of the SHB-EXP elements in the context of sheet metal forming processes, which involve large plastic deformations, material nonlinearity and anisotropy, and double-sided contact. Note that this benchmark test is very popular within the sheet metal forming community and, accordingly, it has been investigated by a number of authors in the literature (see, e.g., Choi and Huh, 1999;Schwarze et al, 2011;Pagani et al, 2014). The schematic view of the setup and the associated geometric dimensions are shown in The initial dimensions of the sheet are 150 mm × 150 mm × 0.81 mm.…”

Section: Deep Drawing Of a Square Cupmentioning

confidence: 99%

Explicit dynamic analysis of sheet metal forming processes using linear prismatic and hexahedral solid-shell elements

Wang

Chalal

Abed‐Meraim

2017

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: https://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/17480 To cite this version :Peng WANG, Hocine CHALAL, Farid ABED-MERAIM -Explicit dynamic analysis of sheet metal forming processes using linear prismatic and hexahedral solidshell elements -ENGINEERING AbstractPropose The purpose of this paper is to propose two linear solid shell finite elements, a sixnode prismatic element denoted SHB6-EXP and an eight-node hexahedral element denoted SHB8PS-EXP, for the three-dimensional modeling of thin structures in the context of explicit dynamic analysis.Design/methodology/approach These two linear solid shell elements are formulated based on a purely three-dimensional approach, with displacements as the only degrees of freedom. To prevent various locking phenomena, a reduced-integration scheme is used along with the assumedstrain method. The resulting formulations are computationally efficient, since only a single layer of elements with an arbitrary number of through-thickness integration points is required to model 3D thin structures. FindingsVia the VUEL user-element subroutines, the performance of these elements is assessed through a set of selective and representative dynamic elasto-plastic benchmark tests, impact-type problems and deep drawing processes involving complex non-linear loading paths, anisotropic plasticity and double-sided contact. The obtained numerical results demonstrate the good performance of the SHB-EXP elements in the modeling of 3D thin structures, with only a single element layer and few integration points in the thickness direction. Originality/valueThe extension of the SHB-EXP solid shell formulations to large-strain anisotropic plasticity enlarges their application range to a wide variety of dynamic elasto-plastic problems and sheet metal forming simulations. All simulation results reveal that the numerical strategy adopted in this paper can efficiently prevent the various locking phenomena that commonly occur in the 3D modeling of thin structural problems.

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“…To avoid this, the initial blank shape can be modified to produce a final et al (1999) suggested a new blank design method combining the ideal forming theory with a deformation path iteration method involving FE analysis. Choi and Huh (1999) introduced a modified membrane finite element with proper formulation to correctly enhance the flexural rigidity not only within an element but also amongst elements. Hu et al (2001) proposed schemes for controlling the flange earring of deep drawing process of circular sheets with stronger anisotropy using a Barlat-Lian anisotropy to yield function conjunction with a quasi-flow corner theory of elastic-plastic deformation.…”

Section: Introductionmentioning

confidence: 99%