Abstract
This paper reports on the design, calibration, and accuracy check of a six-load component dynamometer incorporating octagonal strain rings. The dynamometer was designed using the computer-aided design procedure described in an earlier article by Kroencke and Hull1. The accuracy check revealed inaccuracy which was traced to non-linearity in cross-sensitive load-strain relations. Interface plate compliance was determined as the cause of the nonlinearity by means of finite-element analysis. From this analysis two methods for avoiding the nonlinearity were identified. One is to insure that the interface plates are much stiffer than the octagonal strain rings and the other is to connect the interface plates to the environment so that the boundary conditions are identical for both plates.
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References
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Brewer, R.M., Hull, M.L. The effect of interface plate compliance on dynamometers incorporating octagonal strain rings. Experimental Mechanics 35, 337–344 (1995). https://doi.org/10.1007/BF02317543
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DOI: https://doi.org/10.1007/BF02317543