Numerical Analysis and Simulation of Drawpiece Forming Process by Finite Element Method

Kaldunski, Pawel; Kukiełka, L.

doi:10.4028/www.scientific.net/amm.474.153

Cited by 13 publications

(12 citation statements)

References 5 publications

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“…It can be observed that the values of the equivalent stress at the periphery of the disc after removing the elastic strain is almost 3 times reduced. Figure 5 shows a cross-sectional view of a discrete model of the drawing process (Kaldunski and Kukielka, 2014). The die which is used has rounding radius r d = 16 mm and internal diameter d = 40 mm.…”

Section: Numerical Model and Resultsmentioning

confidence: 99%

Numerical analysis of the deep drawing process including the history of stress and strain

Kaldunski

2018

jtam

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This paper discusses the results of a numerical study of circular cup drawing of steel sheets using finite element method. The drawing process is considered as a geometrical and physical nonlinear problem with unknown boundary conditions in the contact area of the system, such as the tool and the workpiece. The updated Lagrangian description is used to characterize these nonlinear phenomena on a typical incremental step time. Numerical results are obtained using an explicit method in Ansys/Ls-Dyna program. The constitutive Cowper-Symonds material model with linear hardening strain to predict material plasticity is used. The results of implementation of stresses and strains from a blanking operation flat disc of a sheet of metal for deep-drawing process are presented. After the blanking process simulation, an implicit springback analysis is performed. Then a numerical analysis of cup forming from this flat disc plate was carried out. The analysis results are compared with one another through reading of the sheet thickness in several characteristic points and the overall height of the product.

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Section: Numerical Model and Resultsmentioning

confidence: 99%

Numerical analysis of the deep drawing process including the history of stress and strain

Kaldunski

2018

jtam

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“…The concept of incremental description has already been verified by the author and was used to describe other plastic-forming processes: cutting [ 36 , 37 , 38 , 39 , 40 , 41 , 42 ], thread rolling [ 15 , 16 , 17 , 28 , 29 ], burnishing rolling [ 43 , 44 , 45 , 46 , 47 , 48 , 49 ], drawing [ 50 , 51 , 52 ], grinding with a single abrasive grain [ 53 ], calculating the fatigue strength of products [ 54 , 55 , 56 ], and diamond sliding burnishing [ 56 ].…”

Section: Methodsmentioning

confidence: 99%

“…As a result, for successive discrete moments of time τ 0, Δt, 2Δt, … the geometry of the body and the states of incremental displacements, displacement velocities, accelerations, strains, strain rates, and stresses are determined. The concept of incremental description has already been verified by the author and was used to describe other plastic-forming processes: cutting [36][37][38][39][40][41][42], thread rolling [15][16][17]28,29], burnishing rolling [43][44][45][46][47][48][49], drawing [50][51][52], grinding with a single abrasive grain [53], calculating the fatigue strength of products [54][55][56], and diamond sliding burnishing [56].…”

Section: The Concept Of Incremental Descriptionmentioning

confidence: 99%

Application of the FEM Method to Modeling and Analysis of the Cold Thread Rolling Process—Part 1: Conditions for Ensuring a Plane State of Deformations

Kukiełka

2023

Materials

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The article concerns the application of the FEM method for the prediction of stress and deformation states in a workpiece during the thread rolling process (TR). The analysis covered a new kinematic variant of the TR process in which the basket of the head rotates and is torque-driven, while the workpiece is stationary and the head with the rollers moves axially relative to the workpiece. The TR process was considered as a geometrical and physical non-linear initial and boundary problem with non-linear, moving, and variable in time and space boundary conditions. The boundary conditions in the contact areas of the tool with the workpiece were unknown. An updated Lagrange (UL) description was used to describe the physical phenomena at a typical incremental step. The states of strain and strain rate were described by non-linear relationships without linearization. New discrete systems of motion and deformation equations of the object in the TR were introduced, which take into account the change in the stiffness of the system during the TR process. This equation was solved by the central differences method (explicit). The material parameters were estimated during tensile tests to determine the characteristics of the C45 steel, and a new semi-empirical method was used to determine the relationship yield stress, effective true strain, and effective true strain rate in the thread rolling process. A modified Cowper–Symonds material model was also used to model the displacement process of the wedge on an elastic/visco-plastic body reflecting the TR process. A non-linear dependency of material hardening module depending on strain and strain rate was introduced. To confirm the plane state of deformation and spatial state of stress, an experimental investigation was carried out. The computer models were validated, and a good convergence of the results was obtained. Applications in the ANSYS/LS-Dyna program were developed to simulate the TR process. The developed applications enable a comprehensive time analysis of the states of displacement, strain, and stress occurring in an object consisting of a workpiece (shaft) and a tool (roller) for the case of a plane strain state and a spatial stress state. Exemplary results of numerical analyzes are presented to explain the influence of the friction coefficient on the condition of the thread quality, and the state of deformations and stresses were shown.

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“…A further advantage of AWJ technology is its environmental friendliness, since amid the known treatment method of machining only plastic processing [ 11 , 12 ] and AWJ cutting [ 13 , 14 ] can stand up to these requirements.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Studies into Cutting of a Novel Two Component 3D-Printed Stainless Steel–Polymer Composite Material by Abrasive Water Jet

et al. 2023

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Composites are materials with a heterogeneous structure, composed of two or more components with different properties. The properties of composites are never the sum or average of the properties of their components. There is a lot of research and many models on the different property assessments of composite materials. Composites are used as construction materials in key areas of technology, including in civil and mechanical engineering, aviation and space technology, and others. This work presents a modern composite material created with 3D-printing technology using the SLM method, and the possibility of its processing with one of the advanced manufacturing technologies, i.e., the Abrasive Water Jet (AWJ). Tests planned using DoE methods were carried out by changing control parameters such as the pressure, abrasive flow, and traverse speed. As a dependent parameter, the surface roughness parameter Sq (squared mean height) was selected and measured in different places of the cut composite. Based on the S/N ratio, the most favorable control parameters of the cutting process were also determined to achieve the lowest roughness of the cut surface. A clear effect of the controlled cutting process on the surface roughness was observed, as well as roughness variation for the metal and polymer component. In addition, the contact surface of the polymer with the metal in the cut zone was analyzed. Analysis of the contact surfaces on the microscope showed that the gap between the polymer–metal contact surfaces does not exceed 2.5 μm.

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Numerical Analysis and Simulation of Drawpiece Forming Process by Finite Element Method

Cited by 13 publications

References 5 publications

Numerical analysis of the deep drawing process including the history of stress and strain

Numerical analysis of the deep drawing process including the history of stress and strain

Application of the FEM Method to Modeling and Analysis of the Cold Thread Rolling Process—Part 1: Conditions for Ensuring a Plane State of Deformations

Preliminary Studies into Cutting of a Novel Two Component 3D-Printed Stainless Steel–Polymer Composite Material by Abrasive Water Jet

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