Theoretical Analysis of Heat Stress Prefabricating the Crack in Precision Cropping
The mathematical model of the metal bar in course of heat treatment is built by regarding the convective heat transfer process of the metal bar as the heat conduction boundary condition. By the theory analysis and numerical simulation methods, the theoretical expression of unsteady multidimensiona...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Eastern Macedonia and Thrace Institute of Technology
2013-07-01
|
| Series: | Journal of Engineering Science and Technology Review |
| Subjects: | |
| Online Access: | http://www.jestr.org/downloads/Volume6Issue1/fulltext256113.pdf |
| Summary: | The mathematical model of the metal bar in course of heat treatment is built by regarding the convective heat transfer
process of the metal bar as the heat conduction boundary condition. By the theory analysis and numerical simulation
methods, the theoretical expression of unsteady multidimensional temperature field for the axisymmetric model of metal
bar is obtained. Temperature field distribution of bar V-shaped notch equivalent tip is given by ANSYS software. The
quantitative relationship between temperature of bar inner key points and the time is determined. Through the polynomial
curve fitting, the relation between the ultimate strength and the temperature is also given. Based on it, the influences of
the width of the adiabatic boundary and water velocity on the critical temperature gradient of germinating heat crack in
the tip of V-shaped notch are analyzed. The experimental results in precision cropping show that the expression of
unsteady multidimensional temperature field is feasible in the rapid calculation of crack generation. |
|---|---|
| ISSN: | 1791-2377 1791-2377 |