Experimental Methods and Results

  • John D. Campbell
Part of the International Centre for Mechanical Sciences book series (CISM, volume 46)


The problem involved in measuring the mechanical properties of rate-dependent materials have been discussed by Cooper and Campbell [43]. The observed behaviour depends on the interaction of the specimen and test machine, which is largely determined by their relative stiffnesses. If the stiffness of the test machine is much less than that of the specimen (‘soft’ machine), the load-time history may be controlled; if it is much greater (‘hard’ machine), the strain-time history may be controlled.


Flow Stress Delay Period Shear Strain Rate Strain History Initial Strain Rate 
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Copyright information

© Springer-Verlag Wien 1970

Authors and Affiliations

  • John D. Campbell
    • 1
  1. 1.University of OxfordUK

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