Correcting for Transverse Sensitivity

The effects of transverse sensitivity should always be considered in the experimental stress analysis of a biaxial stress field with strain gages. Either it should be demonstrated that the effect of transverse sensitivity is negligible and can be ignored or, if not negligible, the proper correction should be made. Since a two- or three-gage rosette will ordinarily be used in such cases, simple correction methods are given here for the two-gage 90 degree rosette, the three-gage rectangular rosette, and the delta rosette. Unless otherwise noted, these corrections apply to rosettes in which the transverse sensitivities of the individual gage elements in the rosettes are equal to one another, or approximately so. Generalized correction equations for any combination of transverse sensitivities are given in the Appendix .

       Tee Rosettes
           Shear Strains
       Rectangular Rosettes
       Delta Rosettes
           Principal Strains

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