STRAIN VARIATION IN A TRIAXIAL SOIL TEST.
Final rept. for May-Dec 63,
IIT RESEARCH INST CHICAGO ILL
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An experimental program was carried out to evaluate the strain behavior of a soil sample being tested in a triaxial apparatus. The patterns of deformation were obtained at specific locations within the specimen by embedded strain gage measurements. The investigation was made in both noncohesive and cohesive soil types, and included study of the influence of confining pressure, size of specimen, rate of loading, and presence of the gage on the uniformity of deformation. It was determined that the specimen strain behavior is quite different between noncohesive and cohesive soil samples, and that significant nonuniformity of deformation takes place even at small strains, well in advance of failure. Author