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STRESSES IN BOTTLES OR JARS FROM DIFFERENCES IN OUTSIDE AND INSIDE TEMPERATURES (STATIC TEMPERATURE GRADIENT) *
Author(s) -
Preston F. W.
Publication year - 1940
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.1151-2916.1940.tb14219.x
Subject(s) - temperature gradient , bottle , stress (linguistics) , materials science , mechanics , composite material , thermal , forensic engineering , mathematics , thermodynamics , physics , engineering , meteorology , linguistics , philosophy
A bstract This investigation shows that there is likely to be a severe concentration of stress in bottles or jars on the outside face of the junction of side walls and base when the bottles are subjected to a thermal gradient, that is, hot inside and cold outside. The stress in this area apparently may be two or three times as high as the general average, and its amount depends on the details of design at this point. A general formula, intended as a first approximation to the stress, has been worked out. That this region is a region of weakness is not news, but the reasons for it, as deduced in this study, are different from those generally given. Murgatroyd has shown that scratches on a bottle have a greater influence here than elsewhere and that their vulnerability is greatest if they are horizontal. His results are empirical, and he does not explain them. The explanation is given here.