Experimental Determination of the Gage Factor of a Post-Yield Strain Gage

摘要

Experiments were performed to determine the gage factor of a post- yield strain gage as a function of strain. The gage factor was found to increase with increasing strain. A linear expression was found to adequately describe the change of gage factor as a function of strain. The expression for gage factor as a function of strain was incorporated into the bridge output equation for the single active arm Wheatstone bridge. The resulting expression allows accurate determination of strains up to 15 percent. 3 refs., 5 figs. (ERA citation 14:006263)