Plastic deformation simulation of steel panels

This paper presents the FEM analysis of plastic deformation of different steel panels using a spherical indenter. Two experiments were done: first on a simple steel panel and second on a stiffened steel panel, which were subjected to a static plastic deformation produced with help of a spherical indenter. The results of the practical test were compared with the results of numerical simulations, which were accomplished using ANSYS-Static Structural module. The tests were realized using an experimental stand based on a screw press mechanism. The tests consist in vertical displacement of the spherical bulb, which in this way deformed the panel leaning on the stand frame. During the tests were measured the force applied to the indenter, with help of an PLC500 force transducer, and the vertical displacement of the panel in the application point of force, with help of an HBM WA/300 displacement transducer. The results of calculations are presented below as: final deformed models and force-displacement diagrams with the comparison between experiment and numerical simulation. In conclusion of this research the compared results between the experiments and numerical simulations revealed that can be achieved accurate results using FEM analysis for plastic deformation problems, with proper parameters settings.

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Experimental Research on Behaviour of 3D Printed Gripper Soft Jaws

Materiale Plastice ◽

10.37358/mp.20.4.5437 ◽

2021 ◽

Vol 57 (4) ◽

pp. 366-375

Author(s):

Dragos-Florin Chitariu ◽

Emilian Paduraru ◽

Gures Dogan ◽

Mehmet Ilhan ◽

Florin Negoescu ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Mechanical Energy ◽

Test Sample ◽

Displacement Transducer ◽

Force Transducer ◽

Standard Test ◽

Element Analysis ◽

Experimental Stand ◽

3D Printed

In this paper, the problem of the behaviour of soft jaws that can be used to replace the steel jaws of grippers is studied. One of the advantages of additive manufacturing is the printing of fully functional parts. Choice of material is often related to the part strength. The mechanical properties of 3D printed parts should meet the service loading and, also, must be comparable with parts produced by traditional manufacturing techniques - machined parts or injection moulding. From the specialized literature information regarding the test results for effect of various printing parameters on part strength are available made in laboratory conditions and for standard test sample. For ABS materials various values for Young module are presented varying from 1.5 GPa to 2.15 GPa, for 100% infill rate and various modified parameters such as raster orientation. In order to study the behaviour of soft gripper jaws several part were printing and the resistance to bending was tested, by simulating the way a gripper works. An experimental stand was built using a force transducer and a displacement transducer to measure the deformation of the jaw, obtained by 3D printing, under load. The mechanical elastic hysteresis loop during an experimental loading/unloading was plotted and the amount of mechanical energy lost during a cycle, dissipated because the internal friction, was determined. Finite element analysis method was applied to make a comparison with the experimental results. In the finite element analysis, several simulations were considered, varying Young s modulus for the tested material.

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Numerical Analysis of a Plastic Deformation Composite Panel

Materiale Plastice ◽

10.37358/mp.17.3.4887 ◽

2017 ◽

Vol 54 (3) ◽

pp. 527-530

Author(s):

Adrian Presura

Keyword(s):

Numerical Simulation ◽

Plastic Deformation ◽

Composite Materials ◽

Numerical Analysis ◽

Sandwich Panel ◽

Mesh Size ◽

Vertical Displacement ◽

Composite Panel ◽

Steel Panels ◽

Experimental Values

The paper is focused on the comparison between the experimental test and numerical analysis of a composite panel wich is subject to plastic deformation. An experiment was done on a sandwich panel made from steel - extruded polystyrene - steel, wich was subjected to a static plastic deformation with help of an sferical indenter. During the test the force applied to the indenter and the vertical displacement of the steel panels were measured. The experimental values were compared with the results of numerical simulation, wich was done with help of ANSYS-Static Structural module. Important aspects of FEA, such as material idealization, contact approach between bodies, mesh size and boundary conditions, are discussed and their influence on the results are highlighted. The results of this study are vey useful for investigation of beahviour at impact of composite materials such as steel-polystyrene sandwich panels.

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Time-Resolved Force Measurements to Determine Positioning Tolerances for Impulse-Based Indentations

Lasers in Manufacturing and Materials Processing ◽

10.1007/s40516-021-00140-8 ◽

2021 ◽

Author(s):

Tobias Valentino ◽

Marian Höhmann ◽

Kevin Schünemann ◽

Jonas Wentzler ◽

Tim Wünderlich ◽

...

Keyword(s):

Plastic Deformation ◽

Material Properties ◽

Applied Load ◽

Force Measurement ◽

Vertical Displacement ◽

Substrate Material ◽

Spherical Indenter ◽

Angle Of Incidence ◽

Time Resolved ◽

Indentation Force

AbstractHigh-throughput experimentation methods determine characteristic values, which are correlated with material properties by means of mathematical models. Here, an indentation method based on laser-induced shock waves is presented, which predicts the material properties, such as hardness and tensile strength, by the induced plastic deformation in the substrate material. The shock wave pushes a spherical indenter inside a substrate material. For reproducible indentations, the applied load is of importance. To compare different processes and process parameters, the measured plastic deformation is normalized by the applied load. However, eccentric irradiation leads to altered beam profiles on the surface of spherical indenters and the angle of incidence is changed. Thus, the influence of eccentric irradiation is studied with an adapted time-resolved force measurement setup to determine the required positioning tolerances. The spherical indenter is placed inside a cylindrical pressure cell to increase the laser-induced shock pressure. From the validated time-resolved force measurement method we derive that deviations from the indentation forces are acceptable, when the lateral deviation of the beam center, which depends only on the alignment of the setup, does not exceed ± 0.4 mm. A vertical displacement from the focus position between -3.0 mm and + 2.0 mm still leads to acceptable deviations from the indentation force.

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FEM analysis of the plastic deformation of the regular arched asperities in the two-stage cold metal forming processes

10.1063/1.5092084 ◽

2019 ◽

Author(s):

Leon Kukielka ◽

Lukasz Bohdal ◽

Jaroslaw Chodor ◽

Katarzyna Gotowala ◽

Pawel Kaldunski ◽

...

Keyword(s):

Plastic Deformation ◽

Metal Forming ◽

Fem Analysis ◽

Two Stage ◽

Cold Metal

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Characterization of Plastic Deformation Induced by Microscale Laser Shock Peening

Journal of Applied Mechanics ◽

10.1115/1.1782914 ◽

2004 ◽

Vol 71 (5) ◽

pp. 713-723 ◽

Cited By ~ 52

Author(s):

Hongqiang Chen ◽

Jeffrey W. Kysar ◽

Y. Lawrence Yao

Keyword(s):

Plastic Deformation ◽

Single Crystal ◽

Crystal Lattice ◽

Electron Backscatter Diffraction ◽

Fem Analysis ◽

Copper Sample ◽

Laser Shock Peening ◽

Lattice Rotation ◽

Laser Shock ◽

Shock Peening

Electron backscatter diffraction (EBSD) is used to investigate crystal lattice rotation caused by plastic deformation during high-strain rate laser shock peening in single crystal aluminum and copper sample on 110¯ and (001) surfaces. New experimental methodologies are employed which enable measurement of the in-plane lattice rotation under approximate plane-strain conditions. Crystal lattice rotation on and below the microscale laser shock peened sample surface was measured and compared with the simulation result obtained from FEM analysis, which account for single crystal plasticity. The lattice rotation measurements directly complement measurements of residual strain/stress with X-ray micro-diffraction using synchrotron light source and it also gives an indication of the extent of the plastic deformation induced by the microscale laser shock peening.

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Effect of Plastic Deformation on Oscillations in "d" vs. sin2ψ Plots a FEM Analysis

Advances in X-ray Analysis ◽

10.1154/s0376030800020668 ◽

1988 ◽

Vol 32 ◽

pp. 355-364 ◽

Cited By ~ 1

Author(s):

I. C. Noyan ◽

L. T. Nguyen

Keyword(s):

Plastic Deformation ◽

Fem Analysis ◽

Relative Contribution ◽

Elastic And Plastic Deformation

AbstractOscillations jn "d" vs. sin2ψ plots are due to the inhomogeneous partitioning of strains within the diffracting volume. In polycrystalline specimens, such inhomogeneity can be caused by the elastic incompatibility of neighboring grains or by the inhoniogeneous partitioning of plastic deformation within the diffracting volume. There is, however, little work on the degree of inhomogeneity required to cause a given oscillation, and the relative contribution from the elastic and plastic deformation components to a given oscillation.

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Plastic Deformation Simulation of Sintered Ferrous Material in Cold-Forging Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.941.552 ◽

2018 ◽

Vol 941 ◽

pp. 552-557

Author(s):

Yuki Morokuma ◽

Shinichi Nishida ◽

Yuichiro Kamakoshi ◽

Koshi Kanbe ◽

Tatsuya Kobayashi ◽

...

Keyword(s):

Plastic Deformation ◽

True Strain ◽

Fem Analysis ◽

True Stress ◽

Density Change ◽

Cold Forging ◽

Strain Diagram ◽

Metal Part ◽

Forging Process ◽

Sintering Time

A cold forging process of Mo-alloyed sintered steel was simulated by finite element method (FEM) analysis considering density change in the process. Moreover, the effect of sintering time on the behavior of the densification and the plastic deformation of it in the cold-forging process was also investigated. Using the true stress-true strain diagram obtained by the compression test with a sintered specimen, the modified true stress-true strain diagram was derived for large plastic deformation analysis with the porous material model. The result of FEM analysis for the cold compression process of the sintered specimen revealed that the analysis can simulate the shape of the excessive metal part and density change of it. Also, it was found that local deformation becomes large and thus the excessive metal part extends with increasing sintering time although the difference in the true stress-true strain diagrams is negligible.

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Influence of Short Thermal Cracks on the Material Behaviour of a Railway Wheel Subjected to Repeated Rolling

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.891-892.1139 ◽

2014 ◽

Vol 891-892 ◽

pp. 1139-1145 ◽

Cited By ~ 2

Author(s):

Sara Caprioli ◽

Anders Ekberg

Keyword(s):

Plastic Deformation ◽

Numerical Simulations ◽

Rolling Contact ◽

Bulk Deformation ◽

Material Behaviour ◽

Bulk Resistance ◽

Railway Wheel ◽

Thermal Cracks ◽

Radial Cracks ◽

Wheel Material

An analysis of whether and how the occurrence of shallow (radial) thermal cracks promotes additional plastic deformation of a mechanically loaded wheel tread is carried out. The study employs numerical simulations of a 2D slice of an elastoplastic railway wheel tread containing thermal (radial) cracks. The cracked wheel material is subjected to repeated passes of a frictional rolling contact load. The effect of the existing thermal cracks on bulk deformation and subsequent rolling contact promoted growth is quantified. Results indicate that thermal cracks of a depth of 0.1 mm have a negligible effect, whereas 1.0 mm cracks significantly decrease the bulk resistance of the wheel material. Further, it is shown how the magnitude of stress, strain and deformation depends on the direction of applied traction.

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