FEM Modelling of the Distortion of the Blank Case Hardened Gear Blanks due to Chemical Banding

2012-09-30
Şimşir, Caner
Rentsch, Rüdiger
Lütjens, Jörn
In this study, a FEM process-chain simulation model is presented for the prediction of distortion of blank and case-hardened SAE 5120 (EN 20MnCr5) steel gear blanks. For this purpose, the evolution of the banded microstructure stemming from the continuous casting process was traced by computer simulations of subsequent shape rolling, forging and machining steps. The calculated flow-net was imported into the in-house heat treatment simulation module empowered with the recently developed "Anisotropic Transformation Strain (ATS)" model which enables the inclusion of the effect of banded microstructure on distortion. Then, both blank and case-hardening processes were simulated and verified experimentally. The results indicate good predictions of the dishing directions and dishing-free cutting strategy in both cases; the dishing magnitude is predicted well in blank-hardening simulations while the quality of the prediction is reasonable in case-hardening.
6th International Conference on Quenching and Control of Distortion

Suggestions

Nonlinear vibrations of curved single and doublewalled carbon nanotubes /
Samandari, Hamed; Ciğeroğlu, Ender; Department of Mechanical Engineering (2014)
In this thesis, effects of Geometric, initial curvature, and van der Waals (vdW) interlayer force nonlinearities on the variation of nonlinear natural frequency of Carbon Nanotubes (CNTs) are investigated in detail throughout several case studies. Galerkin method with a single trial function, which is the eigenfunction of the linear system, is widely used in literature in studying nonlinear vibrations of CNTs. However, eigenfunctions of the nonlinear systems can be significantly different than the eigenfunc...
Analytical and Experimental Study on Actuation Time of Displacement Amplified Electromagnetic Actuator
Nabae, Hiroyuki; Karaguzel, A. Tugay; Endo, Gen; Suzumori, Koichi (2017-07-07)
This paper describes an analytical study undertaken on an electromagnetic actuator design with a displacement amplification mechanism by explaining the physical modeling and formulizing the actuation time of the actuator in terms of physical model variables. This is followed by an experimental investigation on the actuation time of the electromagnetic actuator. Increasing the gap between the electromagnet and armatures to increase the stroke of the electromagnetic actuator resulted in a drastic loss of the ...
Acidity characterization and adsorption characteristics of cobalt and lead doped SBA15 mesoporous materials
Güner, Özge; Üner, Deniz; Department of Chemical Engineering (2007)
In this study, the surface acidity of Co and/or Pb doped SBA15 mesoporous catalysts were investigated by both diffuse reflectance fourier transform (DRIFT) infrared spectroscopy and transmission mode fourier transform infrared spectroscopy. Pyridine was used to identify the Brønsted and Lewis acid sites of the surface, at room temperature. From the DRIFT spectrum typical stretching vibrations of isolated terminal silanol (Si-OH) groups were observed for all the catalysts. These silanol group bands dissappea...
Behavioral Modeling of Asymmetric Intermodulation Distortion of Nonlinear Amplifier
Yuzer, A. H.; Demir, Şimşek (2010-07-08)
In this study, a behavioural modelling is proposed to model asymmetric IMD components produced in the two tone excitation of nonlinear amplifiers. Model parameters are extracted based on single tone and two-tone measurement results. Then measurement results and model predictions are compared for a four-tone signal.
Evaluation of the Performance Limit States of Reinforced Concrete Columns in View of Experimental Observations
Acun, Bora; Sucuoğlu, Haluk (2011-07-01)
In this study, twelve full-scale column specimens designed for pure flexure were tested under repetitive displacement cycles with high amplitude. Two typical column designs were employed in the production of samples representing sub-standard and code-conforming columns, respectively. The main variable in the experiments was the histories of the imposed displacement amplitudes. The deformation-based performance limits proposed by Eurocode 8, ASCE/SEI 41 and Turkish Seismic Code (TDY-2007) for sub-standard co...
Citation Formats
C. Şimşir, R. Rentsch, and J. Lütjens, “FEM Modelling of the Distortion of the Blank Case Hardened Gear Blanks due to Chemical Banding,” presented at the 6th International Conference on Quenching and Control of Distortion, Chicago, Illinois, Amerika Birleşik Devletleri, 2012, Accessed: 00, 2021. [Online]. Available: http://www.asminternational.org/materials-resources/results/-/journal_content/56/10192/05365G/PUBLICATION.