EXPERIMENTS ON THE MEASUREMENT OF THE RESPONSE OF ROCK TO DYNAMIC LOADS
MISSOURI UNIV-ROLLA SCHOOL OF MINES AND METALLURGY
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The development of instrumentation techniques to measure dynamic stress and strain within rock subjected to impulse-type loads is presented. These techniques were to be applicable to the determination of rock response to nuclear explosive loadings. Electric resistance strain gages and piezoelectric stress gages were the sensing devices utilized. Transducers were em bedded in concrete test cylinders which were loaded by a plane wave generated by high explosive. The sensitivity of the piezoelectric gages utilized was too great for the stress intensities developed, and therefore satisfactory evaluation of the stress measuring technique was not possible. The material presented, summarizing the theoretical aspects of stress and strain measurement at an interior point in a solid, may prove valuable in future embedded gage installations.
- Soil Mechanics