scholarly journals Temperature Modeling of AISI 1045 Steel during Surface Hardening Processes

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1815 ◽  
Author(s):  
Tsung-Pin Hung ◽  
Hao-En Shi ◽  
Jao-Hwa Kuang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Surface Hardening ◽  
Treatment Process ◽  
Scanning Speed ◽  
Element Model ◽  
Laser Surface ◽  
Single Track ◽  
Proposed Model ◽  
Aisi 1045

A Coupled thermo-mechanical finite element model was employed to simulate the possible effects of varying laser scanning parameters on the surface hardening process for AISI 1045 and AISI 4140 steels. We took advantage of the high-power density of laser beams to heat the surface of workpieces quickly to achieve self-quenching effects. The finite element model, along with the temperature-dependent material properties, was applied to characterize the possible quenching and tempering effects during single-track laser surface heat treatment. We verified the accuracy of the proposed model through experiments. The effects of laser surface hardening parameters, such as power variation, scanning speed, and laser spot size, on the surface temperature distribution, hardening width, and hardening depth variations during the single-track surface laser treatment process, were investigated using the proposed model. The analysis results show that laser power and scanning speed are the key parameters that affect the hardening of the material. The numerical results reveal that the proposed finite element model is able to simulate the laser surface heat treatment process and tempering effect of steel.

A Finite Element Model for Elastic and Slip Responses of Fusion Magnets

1980 ◽  
Vol 102 (2) ◽  
pp. 219-225
Author(s):  
T. Y. Chang ◽  
H. Suzuki ◽  
M. Reich
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Bonding Strength ◽  
Element Model ◽  
Type Model ◽  
Shear Stresses ◽  
Homogenization Procedure ◽  
Numerical Examples ◽  
Proposed Model ◽  
Interlayer Slip

A finite element model to simulate the elastic and slip responses of fusion magnets under operating loads is proposed. To represent the elastic actions, a material homogenization procedure based on the existing composite technology was applied to obtain the effective stress strain relations for the heterogeneous, laminated magnets. In addition, a friction-type model was utilized to simulate the interlayer slip of the magnets when the shear stresses reach the bonding strength of the adhesives. Numerical examples are given to demonstrate the applicability of the proposed model.

Deformation of the Pneumatic Tire

1978 ◽  
Vol 6 (4) ◽  
pp. 233-247 ◽  
Author(s):  
H. P. Patel ◽  
C. F. Zorowski
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Material Properties ◽  
Thin Shell ◽  
Element Model ◽  
Shell Of Revolution ◽  
Actual Situation ◽  
Pneumatic Tire ◽  
Proposed Model ◽  
Experimental Values

Abstract A finite element model is presented for analysis of axisymmetric static loadings of a bias ply pneumatic tire. The model can predict deformed shapes and the resulting cord forces in the tire. The tire is considered as a thin shell of revolution with membrane and bending stiffness. Its material properties are assumed to be linearly orthotropic. Large axisymmetric deformations studied with the proposed model gave very close approximations to the actual situation. The predicted cord forces matched the experimental values very closely.

3D bending simulation and mechanical properties of the OLED bending area

Open Physics ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 397-407
Author(s):  
Liang Ma ◽  
Jinan Gu
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stress Relaxation ◽  
Finite Element Model ◽  
3D Model ◽  
Simulation Models ◽  
Element Model ◽  
Uniaxial Tensile ◽  
Proposed Model ◽  
Stress Changes

AbstractDue to the poor mechanical properties of traditional simulation models of the organic light-emitting device (OLED) bending area, this article puts forward a finite element model of 3D bending simulation of the OLED bending area. During the model construction, it is necessary to determine the viscoelastic and hyperelastic mechanical properties, respectively. In order to accurately obtain the stress changes of material deformation during the hyperelasticity determination, a uniaxial tensile test and a shear test were used to obtain data and thus to characterize the hyperelastic properties. In order to measure the viscoelasticity, a stress relaxation test was used to draw the stress relaxation curve, so as to characterize the viscoelastic properties. Then, the plane or axisymmetric stress–strain analysis was achieved, and the material parameters of the 3D model of the OLED bending area were obtained. Finally, the 3D model was applied to the 3D bending of the OLED bending area. Combined with the axisymmetric finite element analysis method, the 3D bending simulation finite element model of the OLED bending area was constructed by dividing the finite element mesh. Experimental results show that the mechanical properties of the proposed model are better than those of traditional OLED bending simulation models. Meanwhile, the proposed model has stronger application advantages.

Study of Modeling and Distortion Predicting for Multi-Frame Components

2010 ◽  
Vol 136 ◽  
pp. 221-226
Author(s):  
Jie Chen
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Prediction Method ◽  
Element Model ◽  
Element Simulation ◽  
Proposed Model ◽  
Distortion Analysis ◽  
Simulation Results ◽  
House Building ◽  
The Finite Element Model

In this study, a method called “house-building frame modeling” based on the APDL language is introduced firstly, and the finite element model of the milling distortion analysis is established for a platform structure with 192 frames by the method, and the prediction analysis of the milling distortion under different milling conditions is carried out, by means of 3-D finite element simulation technology. Comparing the simulation results and the measurement ones of the milling distortion, the proposed model is modified; the modeling method and prediction method are proved to be effective.

scholarly journals Discrete finite element model of reactive powder concrete columns confined with fiber reinforced polymer

2021 ◽  
Vol 15 (2) ◽  
pp. 8178-8192
Author(s):  
Muhammad Abbassi ◽  
Hooshang Dabbagh
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Concrete Columns ◽  
Element Model ◽  
Fiber Reinforced Polymer ◽  
Reactive Powder Concrete ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Proposed Model ◽  
Reactive Powder

Numerous finite element methods have been widely used to predict the response of normal/high strength concrete columns confined with Fiber Reinforced Polymer (FRP) under different loading conditions. In this regard, simulating the response of FRP-confined reactive powder concrete (RPC) columns has been less emphasized. The present study aimed to propose a finite element model based on fiber finite element methodology in order to predict the behavior of FRP confined RPC columns under axial compressive load with different eccentricities. The columns were modeled with a nonlinear beam-column element with two nodes with distributed plasticity. In addition, the proposed finite element model in the present study indicated its simplicity, low computational efforts, and flexibility by adopting a perfect bond between RPC and FRP. Further, the obtained results from the finite element analysis were compared to those from available tested specimens. Based on the comparisons, the proposed model can provide highly satisfactory predictions. Finally, the proposed model can be useful for efficient applications in practical engineering projects.

scholarly journals Dynamic Modeling of Gear System Based on 3D Finite Element Model and Its Application in Spalling Fault Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Zhiguo Wan ◽  
Yihua Dou ◽  
Yuan Guan ◽  
Qi Meng ◽  
Suobin Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Spur Gear ◽  
Fault Analysis ◽  
Gear System ◽  
3D Finite Element ◽  
Reduced Order ◽  
3D Finite Element Model ◽  
Proposed Model

A reduced-order dynamic model, based on three-dimensional (3D) finite element model (FEM) and component modal synthesis technique (CMS), was presented for simulating the dynamic behavior of the spur gear system. The gear shaft and gear body were established via 3D elements to simulate bending and torsion of the gear system. The CMS technique was used to generate a reduced-order model of a spur gear system. A pair of mating teeth was assimilated to two different foundations (one for the pinion tooth and the other one for the gear tooth) linked in series by some independent springs, which was used to simulate the contact stiffness. The validity of the proposed model was verified by static analysis, dynamic analysis, and experimental analysis. The results show that the proposed model is an effective model. In addition, the proposed model has also been applied to analyze spur gear spalling faults. The results show that the dynamic response of the gear system is periodic vibration shock response due to the alternate meshing of single and double teeth. When the spalling fault occurs, some shock responses with significantly enhanced amplitude will be generated as the result of contact loss.

Modeling of Multiteeth Contact Meshing Gear Dynamics with Backlash and Coincidence Degree

2012 ◽  
Vol 562-564 ◽  
pp. 842-846 ◽  
Author(s):  
Zhen Xu ◽  
Hua Deng ◽  
Qi Wang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Coincidence Degree ◽  
Element Model ◽  
Contact Dynamics ◽  
Dynamics Model ◽  
Inertial Property ◽  
Gear Teeth ◽  
Proposed Model ◽  
Gear Contact

In the present paper, a multiteeth meshing gear contact dynamics model is proposed by introducing a modified robotic contact model. The inertial property, backlash of gear teeth and coincidence degree of gear meshing are considered into the model. In addition, the proposed model is used to simulate discontinuous meshing gear contact. Simultaneously, the gear meshing contact dynamical finite element model is also simulated using the Ansys/LS-DYNA software to demonstrate the rationality of the proposed model.

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