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Residual Stress in a Soft‐Buffer‐Inserted Metal/Ceramic Joint
Author(s) -
Xian AiPing,
Si ZhongYao
Publication year - 1990
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.1151-2916.1990.tb06476.x
Subject(s) - buffer (optical fiber) , materials science , residual stress , shear stress , composite material , ceramic , stress (linguistics) , joint (building) , stress concentration , shear (geology) , structural engineering , fracture mechanics , engineering , telecommunications , linguistics , philosophy
Residual stresses in a soft buffer layer developing during cooling of a metal/buffer/ceramic joint were analyzed. It is shown that there is a parabolic distribution for normal stress and a cubic parabola for shear stress in the buffer. The maximum shear stress, τ 12 or τ 13 , is approximately proportional to the ratio of length to thickness of the buffer, and it is far more than the normal stress σ 1 , σ 2 or σ 3 . With increasing thickness of the soft buffer, the maximum shear stress will decrease, but the normal stress will change little. A new physics parameter m is suggested in this paper to describe the beneficial role of the buffer, and the influence factors of m are also discussed.