The GDS Small-Strain Hollow Cylinder Apparatus
(SS-HCA) allows for rotational displacement and torque to be
applied to a hollow cylindrical specimen of soil. Using this device
it is possible to control the magnitude and direction of the three
principal stresses. Studies can for example be made of the
following:
The anisotropy of soil samples.
The effects of principal stress
rotation.
The effects of intermediate principal
stress.
Download full
specification datasheet as
pdf
[257kb]
GDSLAB software
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What are its
uses
The GDS SS-HCA can apply a uniquely wide range of stress paths on
the test specimen. The loading systems are computer controlled and
strains can be measured directly on the test specimen. These strains
can also be servo-controlled. Studies can therefore be made under
the following test conditions:
Plane strain.
Simple shear.
Very small shear strain.
Two versions of the SS-HCA are available, a dynamic (SSHCA d) and a
lower cost "static" (SS-HCA s) version. The SSHCA d has been
developed to be a complete dynamic hollow
cylinder apparatus (dynamic axial and rotational axes) at a price
approaching that of a standard dynamic triaxial system.
