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44.3: Mechanical Robustness of Thin AMLCD Glass Substrates Under Point Loading
Author(s) -
Gulati S. T.,
Roe T. A.,
Helfinstine J. D.,
Lapp J. C.
Publication year - 2001
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 - 10.1889/1.1831765
Subject(s) - materials science , peek , composite material , three point flexural test , strain gauge , aluminium , robustness (evolution) , structural engineering , bending , engineering , polymer , biochemistry , chemistry , gene
The biaxial strength of 0.7mm thick AMLCD substrates of Code 1737G glass was measured under the point loading using hemispherical lifter pin made from two different materials, namely PEEK plastic and aluminum metal. The effect of impact‐generated damage by these pins on biaxial strength was also quantified using strain gages on tension and compression sides. The data show that biaxial strength under point loading is 34% higher that due to a uniform bending moment over a large central area. The effect of impact damage of up to 4.5N** force was quantified using this test. The minimum strength of as‐received specimens was reduced by 14% in the case of PEEK lifter pin and 41% in the case of aluminum pin suggesting the latter to be more damaging that PEEK lifter pin. The mean strength, however, was not affected adversely.