Title :
Finite element analysis investigating thermal stress characteristics and weight reduction design for perfectly flat CRT
Author :
Kim, Kug Weon ; Kim, Nam Woong ; Kang, Dae-Jin
Author_Institution :
Digital-Media Res. Lab., LG Electron. Inc., Seoul, South Korea
fDate :
11/1/1998 12:00:00 AM
Abstract :
For the perfectly flat CRT (PFCRT), corner cracking of the panel while passing through the exhaust furnace has been a long standing problem. These cracks frequently occur during the heat-up cycle for the evacuation in the exhaust furnace and originate on the corner of the inner surface of the panel. The transient stresses for the perfectly flat CRT during the heat-up cycle for the evacuation in the exhaust furnace in which both thermal and vacuum loads are applied are analyzed by the finite element method. From the results, the transient stress states and the crack propagation are clearly explained. Also by using the numerical analysis, a design aimed at the weight reduction is investigated. For the PFCRT with 1 mm reduced panel glass, the thermal stresses are calculated with consideration of vacuum load taken into account
Keywords :
cathode-ray tubes; crack-edge stress field analysis; finite element analysis; flat panel displays; stress measurement; thermal analysis; 1 mm; corner cracking; crack propagation; evacuation; exhaust furnace; finite element analysis; heat-up cycle; numerical analysis; perfectly flat CRT; thermal load; thermal stress characteristics; transient stresses; vacuum load; weight reduction design; Boundary conditions; Cathode ray tubes; Equations; Finite element methods; Furnaces; Surface cracks; Temperature distribution; Thermal conductivity; Thermal loading; Thermal stresses;
Journal_Title :
Consumer Electronics, IEEE Transactions on