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SAE J932 2011 Edition, August 1, 2011
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Definitions for Macrostrain and Microstrain
Includes all amendments and changes through Stabilization Notice (No longer revised / updated) , August 2011
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AIA/NAS Aerospace Standards
In the analysis and measurement of residual stresses of materials, it has been noted that there are frequently differences in interpretation of the terms "macrostrain" and "micro strain." To assist communication among research personnel in this area, definitions for these two terms are suggested by the Fatigue Design and Evaluation Committee of SAE. Since "macrostress" is commonly computed from "macrostrain" in residual stress analysis, to be consistent, the definitions given are for "mactrostrain" and "mictrostrain."