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47.4: Effect of Glass Thickness on Stress in a Centrally Loaded LCD‐TV Panel
Author(s) -
Gulati S. T.,
Helfinstine J. D.,
Bayne J. F.,
Lapp J. C.
Publication year - 2003
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1832533
Subject(s) - deflection (physics) , durability , materials science , strain gauge , flat panel , composite material , structural engineering , ultimate tensile strength , engineering , optics , physics
An analytical solution, based on linear plate theory, shows that the maximum tensile stress in an LCD‐TV panel loaded at the center and simply supported at the four edges depends on several independent factors, namely i) glass thickness, ii) nature of the load, whether static or dynamic, iii) constraints on the center deflection, and iv) details of the cell structure, such as the size, spatial density and properties of the cell spacers and their response to the load. In the case of static load, a thicker panel will experience higher stresses than a thinner panel for identical values of center deflection. In the case of dynamic load, i.e. impact by a spherical ball, the thicker panel will also experience higher stresses than a thinner panel for identical values of center deflection. Experimental data based on strain gages and fractographic analysis of fracture origins are in progress to examine the pros and cons of thick vs. thin glass panels from a mechanical durability point of view. Dynamic loading can induce higher stresses than static loading and hence is a more sever test for mechanical durability.