Experimental Mechanics

, Volume 10, Issue 10, pp 408–414 | Cite as

Dynamic plastic response of foil gages

Foil gages are compared with interferometric strain measurement for plastic impact. The two methods agree reasonably well
  • William N. SharpeJr.


Little research has been devoted to the accuracy of the response of resistance strain gages to dynamic plastic strain because of the lack of an easy-to-use comparative strain-measuring technique. The dynamic interferometric strain gage provides a suitable standard of comparison. Foil-gage response is compared directly with interferometric strain-gage response in a longitudinal-impact experiment. The accuracy of the foil gage does not decrease with increasing maximum strain (up to 8 percent). The error in shape of the strain wave does not vary drastically with distance from the point of impact. In contrast to previous work, foil gages are found to be reasonably accurate strain transducers for dynamic plastic strain.


Mechanical Engineer Fluid Dynamics Strain Gage Resistance Strain Maximum Strain 
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Copyright information

© Society for Experimental Mechanics, Inc. 1970

Authors and Affiliations

  • William N. SharpeJr.

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