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FURTHER DEVELOPMENTS ON TORSIONAL APPARATUS FOR MEASURING PLASTICITY 1
Author(s) -
Parmelee C. W.,
Rudd R. D.
Publication year - 1929
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.1151-2916.1929.tb16212.x
Subject(s) - composite material , stress (linguistics) , materials science , molding (decorative) , section (typography) , square (algebra) , stress–strain curve , strain (injury) , limit (mathematics) , mechanics , geometry , deformation (meteorology) , mathematics , physics , computer science , philosophy , linguistics , medicine , mathematical analysis , operating system
A critical study of the apparatus has been carried on to reduce variations in results due to manipulation. Specimens were made by squeeze molding in saturated plaster molds instead of forming in the hands. The loading device was changed so that the stress could be increased continuously instead of intermittently as heretofore. The specimens were designed so that the ratio of the maximum stress in the outer fibers of the circular section was to that of the square section as 3.8 is to 1. Clays having the same water content were compared by studying the slopes of the stress‐strain curve sup to the proportional limit.