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Impact Fracture of Chemically Tempered Glass Helicopter Windshields
Author(s) -
LEIL MAHMOUD M.,
CAMARATTA FRANK A.,
DIGENOVA ROCCO R.
Publication year - 1986
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1986.tb07477.x
Subject(s) - toughened glass , tempering , windshield , projectile , materials science , fracture (geology) , composite material , residual stress , forensic engineering , izod impact strength test , mechanics , metallurgy , engineering , ultimate tensile strength , mechanical engineering , physics
Helicopter windshield glass with different degrees of chemical tempering was impact tested by firing spherical projectiles at velocities between 50 and 250 m/s. The residual tempering stresses were measured photoelastically and their values superimposed on the Hertzian impact stresses. Modified forms ol Auerbach's law 1 were utilized to study the experimental results. Lower impact fracture strength and deviations from the modified relations were attributed to changes in surface Flaw distributions.