Simulation Study of Temperature Field and Stress Field of Disc Brake Based on Direct Coupling Method

2009 ◽  
Vol 628-629 ◽  
pp. 287-292 ◽  
Author(s):  
Xun Yang ◽  
Ji Xin Wang ◽  
J.C. Fan
Keyword(s):  
Temperature Field ◽  
Stress Field ◽  
Material Selection ◽  
Three Dimensional ◽  
Element Model ◽  
Direct Coupling ◽  
Coupling Method ◽  
Disc Brake ◽  
Emergency Braking ◽  
Sequential Coupling

In the process of automobile braking, the interaction between the temperature and the dynamic stress of disc brake is a very complex work. In order to simulate this problem accurately, a three-dimensional finite element model was built. Meanwhile the displacement and thermal boundary conditions for solution were determined, in which the coefficient of convection varies with the transient changing of temperature and time. The distributions of stress field and temperature field of the rotor and pads in an emergency braking were analyzed by the direct coupling method. The results of analysis prove that the thermal-structural direct coupling method can simulate the interaction between the stress field and the temperature field more exactly than the axisymmetric method and sequential coupling method do. The changing of stress field is mainly influenced by the temperature field. The results extracted from coupled simulation can give references for the material selection and structural designs in the development of disc brake.

scholarly journals Research on the Temperature Field and Frost Heaving Law of Massive Freezing Engineering in Coastal Strata

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Chaochao Zhang ◽  
Dongwei Li ◽  
Junhao Chen ◽  
Guanren Chen ◽  
Chang Yuan ◽  
...  
Keyword(s):  
Temperature Field ◽  
Three Dimensional ◽  
Element Model ◽  
Freezing Temperature ◽  
Frozen Soil ◽  
Physical Parameters ◽  
Frost Heaving ◽  
Soil Frost ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

In this study, based on the background of massive freezing engineering in coastal strata, the thermal physical parameters and some freezing laws of soil were obtained through soil thermal physical tests and frozen soil frost heaving tests. When the freezing temperatures were −5°C, −10°C, −15°C, and −20°C, the frost heaving rates of the soil were 0.53%, 0.95%, 1.28%, and 1.41%, and the frost heaving forces of the soil were 0.37 MPa, 0.46 MPa, 0.59 MPa, and 0.74 MPa, respectively. In the range of test conditions, the frost heaving rate and the frost heaving force of the soil increased with the decrease of the freezing temperature, and the relationship was roughly linear with the temperature. The entire cooling process could be roughly divided into three stages: active freezing stage, attenuation cooling stage, and stability stage. The range of the frozen soil expansion did not increase linearly with the decrease of the freezing temperature, and there was a limit radius for the frozen soil expansion. A three-dimensional finite element model was established to simulate the temperature field and frost heaving of the soil under the on-site working conditions. The entire frost heaving process could be roughly divided into two stages. The calculated temperature values and the frost heaving force values were compared with the on-site measured values, and the results verified that the numerical calculation could accurately reflect the temperature field and frost heaving law of the formation.

scholarly journals Springback Calibration of a U-Shaped Electromagnetic Impulse Forming Process

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 603 ◽  
Author(s):  
Xiaohui Cui ◽  
Zhiwu Zhang ◽  
Hailiang Yu ◽  
Xiaoting Xiao ◽  
Yongqi Cheng
Keyword(s):  
Tangential Stress ◽  
Three Dimensional ◽  
Element Model ◽  
Simulation Method ◽  
Discharge Voltage ◽  
Electromagnetic Forming ◽  
Forming Process ◽  
Sheet Bending ◽  
Sequential Coupling ◽  
Good Agreement

A three-dimensional (3D) finite-element model (FEM), including quasi-static stamping, sequential coupling for electromagnetic forming (EMF) and springback, was established to analyze the springback calibration by electromagnetic force. Results show that the tangential stress at the sheet bending region is reduced, and even the direction of tangential stress at the bending region is changed after EMF. The springback can be significantly reduced with a higher discharge voltage. The simulation results are in good agreement with the experiment results, and the simulation method has a high accuracy in predicting the springback of quasi-static stamping and electromagnetic forming.

Finite Element Simulation of Temperature Field in Fused Deposition Modeling

2010 ◽  
Vol 97-101 ◽  
pp. 2585-2588 ◽  
Author(s):  
Liang Bo Ji ◽  
Tian Rui Zhou
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Fused Deposition Modeling ◽  
Parametric Design ◽  
Three Dimensional ◽  
Physical Property ◽  
Acrylonitrile Butadiene Styrene ◽  
Element Model ◽  
Fused Deposition ◽  
Deposition Modeling

Taking into account temperature-dependent thermal conduction and heat capacity, based in the research on the physical property of the material of Acrylonitrile Butadiene Styrene (ABS), a three-dimensional transient thermal finite element model has been developed in Fused Deposition Modeling (FDM). The moving material of ABS by the sprayer on the mold equipment is simulated with the employment of ANSYS parametric design language (APDL) and latent heat is considered by using enthalpy. By the technique of element live and die on ANSYS software and using the nonlinear finite element method, several conclusions according to the simulation results were produced, first of all, the simulation result shows that the temperature field distribution likes an ellipse; secondly, comparing with the previous track, the latter one has larger heat affected region and larger inhomogeneous temperature distribution; the greatest temperature gradient takes place near the edges of deposited part where the sprayer scanning direction changes.

Analytical Solution of Transient Three-Dimensional Temperature Field in a Rotating Cylinder Subject to a Localized Laser Beam

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Mostafa M. Kashani ◽  
Mohammad R. Movahhedy ◽  
Mohammad T. Ahmadian ◽  
Reza Shoja Razavi
Keyword(s):  
Temperature Field ◽  
Analytical Solution ◽  
Analytical Model ◽  
Material Removal ◽  
Three Dimensional ◽  
Element Model ◽  
Rotating Cylinder ◽  
Transient Temperature ◽  
Analytical Scheme ◽  
Temperature Filed

Laser-assisted machining (LAM) is a growing trend in machining of hard to cut materials. In most experimental cases, LAM is carried out in two stages; first, laser and machine parameters are tuned to adjust the temperature at the material removal point (Tmr), and second, the cutting tool is engaged to cut the points that have already been heated by the laser. Alternatively, an analytical model for the prediction of temperature filed can replace lengthy experimentation needed for tuning the material removal temperature. This paper presents an analytical solution to the transient temperature field in a rotating cylinder subject to a localized laser heat source based on Green's functions. The analytical solution is validated by comparing the surface point temperatures to thermal experiments on DIN 1.7225 steel, which shows good agreement in trend and values. Furthermore, a finite element model is developed and verified by the results of the same experiments, providing a more detailed investigation on the performance of the analytical model. The developed analytical scheme can be used to readily calculate pointwise temperatures on workpiece surface and internal points which can be used as a tool for designing machining conditions.

scholarly journals Research on Contact Pressure Distribution of Pad

2018 ◽  
Vol 198 ◽  
pp. 01002
Author(s):  
Dong Chen ◽  
Guofeng Zou
Keyword(s):  
Pressure Distribution ◽  
Contact Pressure ◽  
Working Condition ◽  
Great Influence ◽  
Element Model ◽  
Disc Brake ◽  
Contact Pressure Distribution ◽  
Structural Coupling ◽  
Emergency Braking ◽  
Force Characteristics

A simplified thermo-structural coupling finite element model of disc brake was developed. The contact pressure distribution of new pad was simulated under an emergency braking condition. The result shows that the contact pressure distribution of pad is not uniform when the new pad is in normal working condition. The inhomogeneity of the contact pressure is a critical cause of tangential partial wear. Compared the contact pressure distribution of new pad, uniform wear pad and tangential partial wear pad, the influence of wear amount and tangential partial wear on the contact pressure of pad was investigated. The results prove that the influence of wear amount on the contact pressure of pad is very small, while tangential partial wear has a great influence on the contact pressure of pad. The wear and force characteristics of pad are analyzed. The wear of its life cycle of pad is obtained, and the reliability and accuracy of the simulation are verified.

TRANSIENT THERMO-STRESS FIELD OF BRAKE SHOE DURING MINE HOIST EMERGENCY BRAKING

2013 ◽  
Vol 37 (4) ◽  
pp. 1161-1175 ◽  
Author(s):  
Zhen C. Zhu ◽  
Wan Ma ◽  
Yu X. Peng ◽  
Guo A. Chen ◽  
Bin B. Liu
Keyword(s):  
Stress Field ◽  
Friction Surface ◽  
Numerical Solutions ◽  
Three Dimensional ◽  
Temperature Gradients ◽  
Fe Model ◽  
Brake Shoe ◽  
Emergency Braking ◽  
Friction Tester ◽  
Mine Hoist

In this paper, the finite element (FE) model of the three-dimensional (3-D) transient thermo-stress field of a brake shoe was established and then the software ANSYS 13.0 was used to get the numerical solutions; an experiment was carried out on the X-DM friction tester to verify the FE model. It was found that both the whole temperature and the equivalent stresses of the brake shoe increased and then decreased during mine hoist emergency braking; region of 1 to 3 mm below the friction surface was suffered to larger temperature gradients and stresses.

Heat Damage of High-Temperature Rock Tunnel by Weighted Residual Method in Tibet Plateau

2013 ◽  
Vol 790 ◽  
pp. 259-263 ◽  
Author(s):  
Li Na Ma ◽  
Song Hong Yan ◽  
Rong Ling Zhang ◽  
Tie Gen Li
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
High Temperature ◽  
Three Dimensional ◽  
Element Model ◽  
Tibet Plateau ◽  
Basic Rule ◽  
Weighted Residual Method ◽  
Residual Method ◽  
Rock Tunnel

According to the weighted residual method to deduce the finite element method of temperature field. The Jiwoxiga high-temperature rock tunnel on the Lhasa-Shigatse railway line is taked for example in the paper, then the actual drilling temperature data was combined to establish three-dimensional finite element model, the basic characteristics of temperature field was forecasted, the basic rule of temperature was obtained and the data can be compared with the actual data. It can provide references for the actual construction and ensure the similar engineering construction.

Sign in / Sign up

Export Citation Format

Share Document