Type of Document Master's Thesis Author Parathiras, Vasilis URN etd-02072013-040102 Title Stress-density relationships for an agricultural soil Degree Master of Science Department Mechanical Engineering Advisory Committee
Advisor Name Title Robertshaw, Harry H. Committee Chair Fries, Robert H. Committee Member Perumpral, John V. Committee Member Keywords
- Soil mechanics
Date of Defense 1987-04-05 Availability restricted Abstract
Triaxial tests under high loading rates and different confining pressures simulate the multi-pass effect of a tractor wheel loading on the soil. A volume measuring technique was developed to be used in triaxial tests conducted under high loading rates.
A sandy clay agricultural soil was tested under predetermined conditions using an INSTRON loading frame, a differential pressure transducer and an APPLE Il + microcomputer. A preliminary analysis indicated that the measuring technique that was developed, was capable of recording volume changes under high loading rates. Stress-density plots were created using the obtained data and a mathematical model was developed relating stress to density. Stress-strain data was used to evaluate the soil parameters under the Mohr-Coulomb failure criteria. Furthermore, the influence of the initial soil density on the soil behavior was evaluated and subsequently compared to the results of a similar study conducted under a different initial density.
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