Development and Design of an Advanced Directional Shear.
Interim technical rept.,
UNIVERSITY COLL LONDON (ENGLAND)
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A prototype shear apparatus of the type known as a Directional Shear Cell has been designed. The purpose of the prototype is the shearing of undisturbed soil samples at stress levels normal in engineering practice with completely controlled rotation of principal stress directions through 0 deg to 360 deg in the plane of strain. Factors affecting the design are listed and discussed to explain the form of the resulting design. The design is presented in some detail, but without working drawings. Testing will be automatic stress paths including undrained and cyclic paths, will be imposed under computer control and boundary strains will be processed automatically. In addition it will be possible to determine strain distributions in samples by either radiography or photography.