A Model for Predicting the Heat Flow into the Workpiece in Dry Drilling

2002 ◽  
Vol 124 (4) ◽  
pp. 773-777 ◽  
Author(s):  
Matthew Bono ◽  
Jun Ni
Keyword(s):  
Heat Flux ◽  
Finite Element ◽  
Temperature Field ◽  
Heat Flow ◽  
Finite Element Model ◽  
Element Model ◽  
Partition Model ◽  
Dry Drilling ◽  
Heat Partition ◽  
Thrust And Torque

A model is developed for predicting the heat that flows into the workpiece during dry drilling processes. The model can be applied to any drill of known geometry. The measured drilling thrust and torque are used as inputs in an oblique cutting analysis, and an advection heat partition model is developed to calculate heat flux loads on a finite element model of the workpiece. Experiments using embedded thermocouples have verified that the model accurately predicts the temperature field in the workpiece for a range of drilling speeds and feeds.

scholarly journals Two-dimensional finite element analysis investigation of the heat partition ratio of a friction brake

2018 ◽  
Vol 232 (12) ◽  
pp. 1489-1501 ◽  
Author(s):  
Le Qiu ◽  
Hong-Sheng Qi ◽  
Alastair Wood
Keyword(s):  
Heat Flux ◽  
Finite Element ◽  
Finite Element Model ◽  
Thermal Contact ◽  
Element Model ◽  
Partition Ratio ◽  
Thermal Contact Conductance ◽  
Interface Temperature ◽  
Two Dimensional ◽  
Heat Partition

A two-dimensional coupled temperature–displacement finite element model is developed for a pad-disc brake system based on a restricted rotational pad boundary condition. The evolution of pressure, heat flux, and temperature along the contact interface during braking applications is analysed with the finite element model. Results indicate that different rotational pad boundary conditions significantly impact the interface pressure distribution, which in turn affects interface temperature and heat flux distributions, and suggest that a particular pad rotation condition is most appropriate for accurately modelling friction braking processes. The importance of the thermal contact conductance in the analysis of heat transfer in friction braking is established, and it is confirmed that the heat partition ratio is not uniformly distributed along the interface under normal and high interface thermal conductance conditions.

Analysis of the Temperature Field of the Diamond Wheel Dressed Using Laser Assisted Ultrasonic-Vibration Combined Dressing Method

2016 ◽  
Vol 874 ◽  
pp. 261-267 ◽  
Author(s):  
Zhi Bo Yang ◽  
Zhen Zhang ◽  
Rui Yun Yang ◽  
Ai Ju Liu
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Finite Element Model ◽  
Ultrasonic Vibration ◽  
Working Conditions ◽  
Element Model ◽  
Diamond Wheel ◽  
Dressing Method ◽  
Infrared Temperature Measurement ◽  
The Finite Element Model

During the dressing process of diamond wheel using laser/ultrasonic-vibration combined dressing method, the removal mode of the local materials on the surface of wheel with the use of laser’s heating effect transits from brittle fracture to plastic flow, so that the wear of diamond dresser can be reduced and the dressing efficiency and surface dressing quality can be improved. Using ANSYS analysis software, the three-dimensional units were used and the nonlinearity of the material’s thermophysical properties was taken into account, and thereby, the finite element model of the temperature field of the diamond wheel heated by the laser during the dressing process was constructed. Then, the distributions of the temperature field on the surface and section of the wheel under different technological parameter were acquired. Moreover, the temperature distribution of the dressed wheel under actual working conditions was measured using infrared temperature measurement method. The results indicate that, under the same working conditions, the simulation results using finite element model fit well with the measured values, i.e., the finite element model has important guiding significance to the selection of technological parameters in dressing.

scholarly journals A two-phase Finite Element model for coupled heat flux and water flow in fully saturated soils

PAMM ◽  
2009 ◽  
Vol 9 (1) ◽  
pp. 391-392
Author(s):  
Mengmeng Zhou ◽  
Felix Nagel ◽  
Jens Kruschwitz ◽  
Günther Meschke
Keyword(s):  
Heat Flux ◽  
Finite Element ◽  
Finite Element Model ◽  
Water Flow ◽  
Element Model ◽  
Saturated Soils ◽  
Two Phase
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