scholarly journals Experimental and Numerical Studies of Pearlitic Transformation Plasticity in S45C Steel Subjected to Bending Loading System

2016 ◽  
Vol 65 (7) ◽  
pp. 532-537
Author(s):  
M. Arif HAMDAM ◽  
Shigeru NAGAKI ◽  
Kenichi OSHITA ◽  
Shinya HANAMURE
Keyword(s):  
Transformation Plasticity ◽  
Numerical Studies ◽  
Pearlitic Transformation ◽  
Loading System ◽  
Bending Loading

Thermo-Elasto-Plastic Analysis of Pearlitic Transformation Plasticity under Combined Bending-Tensile Loading

2016 ◽  
Vol 725 ◽  
pp. 328-333
Author(s):  
M. Arif Hamdam ◽  
Kazuki Takahashi ◽  
Hayata Tateoka ◽  
Kenichi Oshita ◽  
Shigeru Nagaki
Keyword(s):  
Hydrostatic Pressure ◽  
Deformation Theory ◽  
Tensile Loading ◽  
Transformation Plasticity ◽  
Pearlitic Transformation ◽  
Plastic Analysis ◽  
Loading System ◽  
Dependent Model ◽  
Loading Tests ◽  
Applied Tensile Stress

In a previous study, we showed the anisotropy of plastic strain due to the pearlitic transformation and proposed a hydrostatic pressure-dependent constitutive equation to describe this phenomenon. In the present study, we assess the validity of this model using a bending-tensile loading system to experimentally and numerically analyze and characterize the pearlitic transformation plasticity. First, the maximum bending deflections due to the austenite-pearlite transformation were measured under different loadings and then transformation-plasticity coefficients were determined. Furthermore, as was done for bending-tensile loading tests, the pearlitic transformation plasticity was simulated using Abaqus Standard under the same austenitization and loading conditions as in experiments, and the calculated results for pearlitic-transformation plastic deformation are compared with the experimental results. The results show that the transformation plastic deflection due to the pearlitic transformation decreases with increasing applied tensile stress. In addition, this behavior can be described by a hydrostatic pressure-dependent model in large-deformation theory.

scholarly journals 20108 Evaluation of transformation plasticity under combined bending-tensile loading system

2014 ◽  
Vol 2014.20 (0) ◽  
pp. _20108-1_-_20108-2_
Author(s):  
Mohammad Arif HAMDAM ◽  
Shigeru NAGAKI ◽  
Kenichi OSHITA
Keyword(s):  
Tensile Loading ◽  
Transformation Plasticity ◽  
Loading System

Experimental Investigation of Transformation Plastic Behavior under Tensile-Compressive-Torsional Stress in Steel

2014 ◽  
Vol 626 ◽  
pp. 426-431 ◽  
Author(s):  
Naoki Hikida ◽  
Yuta Yamamoto ◽  
Kenichi Oshita ◽  
Shigeru Nagaki
Keyword(s):  
Hydrostatic Pressure ◽  
Testing System ◽  
Plastic Behavior ◽  
Test Results ◽  
Transformation Plasticity ◽  
Biaxial Testing ◽  
Torsional Strain ◽  
Pearlitic Transformation ◽  
Dependent Model ◽  
Plasticity Coefficient

A tensile/compressive-torsional biaxial testing system was employed and tensile/ compressive-torsional tests were performed for the hollow specimen, which was loaded and the austenized specimen was cooled so that pealrite transformation accompanied by transformation plasticity occurred and axial and torsional strain were measured. Furthermore, the elastic-plastic constitutive equation due to phase transformation based on the hydrostatic pressure dependent model was proposed, and the validity of this equation was discussed experimentally. The test results showed the transformation plasticity coefficient due to pearlitic transformation of S45C depends on the loading direction, and these behaviour can be appropriately expressed by the hydrostatic pressure dependent model than the isotropic model.

The Effect of Transformation Plasticity on Prediction of Tooth Distortion of Heat-Treated Helical Gear

2007 ◽  
Vol 561-565 ◽  
pp. 1853-1856 ◽  
Author(s):  
A. Sugianto ◽  
Michiharu Narazaki ◽  
M. Kogawara ◽  
S.Y. Kim ◽  
S. Kubota
Keyword(s):  
Thermal History ◽  
Helical Gear ◽  
Low Alloy Steel ◽  
Transformation Plasticity ◽  
Heat Treated ◽  
Pearlitic Transformation ◽  
Gas Carburizing ◽  
Modification Method ◽  
Displacement Profile ◽  
Capacity Method

The displacement profile in a shank and dedendum-addendum circle of helical gear made of through-hardened S45C carbon steel and carburized-hardened SCr420H low alloy steel by gas carburizing was measured and predicted using a finite element method of DEFORM-HT. Both gears were quenched into same oil quenchant. Heat Transfer Coefficient (HTC) was taken by measuring thermal history inside of firstly silver probe and secondly stainless steel SUS304 gear blank. Uniform HTC of silver probe was calculated by lumped heat capacity method, whereas zone-based HTC of SUS304 gear blank was calculated by iterative modification method. Transformation plasticity was included and excluded to predict the tendency of distortion. Simulation results were analyzed and compared to the experimental results to validate the influence of transformation plasticity on the prediction of distortion during the martensitic and bainitic/pearlitic transformation. However, more accurate distortion profiles require detailed HTC by taking thermal history on the surface of the tooth.

An improved collapse axis on the R6 FAD for combined tension and bending loading

1993 ◽  
Vol 28 (1) ◽  
pp. 23-29
Author(s):  
N ø Kristiansen ◽  
C E Turner
Keyword(s):  
Plastic Hinge ◽  
Constraint Factor ◽  
True Path ◽  
Loading System ◽  
Edge Notch ◽  
Path Lengths ◽  
The Moment ◽  
Moment Load ◽  
Bending Loading ◽  
Linear Loading

Experimental and computational studies were made of a number of single edge notch (SEN) specimens loaded through eccentric pins with notch depth ratios 0.21 and 0.52. It was found that as the applied load was increased the formation of a plastic hinge mechanism caused the ligament to shift sideways and in turn alter the ratio of bending to tension loading. The two different assumptions, constant and variable bending to tension ratio, gave very different paths in the moment-load ( M-Q) space, and failure lines when plotted on the R6 Fracture Analysis Diagram (FAD). An improved expression for normalized load, Sr, for SEN geometries under a linear loading system was obtained by including a plastic constraint factor in the uncreacked lower bound solution. For the pin-loaded SEN specimens under a non-linear loading system, it was shown that Sr based on ‘true path lengths’ in the yield diagram gave a failure curve which was in good agreement with the R6 Rev3 solution.

Experimental and numerical studies of radiative shocks

2006 ◽  
Vol 133 ◽  
pp. 1013-1017 ◽  
Author(s):  
C. Michaut ◽  
L. Boireau ◽  
T. Vinci ◽  
S. Bouquet ◽  
M. Koenig ◽  
...  
Keyword(s):  
Radiative Shocks ◽  
Numerical Studies

Numerical Studies on Behavior of Lorentz-Force-Applied Boundary Layer in Supersonic Flow

2009 ◽  
Vol 129 (6) ◽  
pp. 831-839
Author(s):  
Keisuke Udagawa ◽  
Sadatake Tomioka ◽  
Hiroyuki Yamasaki
Keyword(s):  
Boundary Layer ◽  
Supersonic Flow ◽  
Lorentz Force ◽  
Numerical Studies
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