Large-Scale Deformation Apparatus
Testing accessories and preparation equipment
DEF-S1600 Large-Scale Deformation Device


The GCTS DEF-S1600 Large-Scale Deformation Device is ideal for large-scale testing with its multiple options available. This device is ideal for yielding accurate results when it comes to measuring axial strains.

 

  • Measures average axial and radial Strains on 300 mm diameter specimens
  • Waterproof to 2,000 kPa
  • Available devices for cylindrical specimens with diameters from 200 mm to more than 1,000 mm
  • Can be use for testing soils, asphalt and other materials
  • User configurable
  • Small strain measurements on large-scale specimens
  • Range selection for small, medium, and large radial strains

 

The GCTS Large-Scale Deformation Device (DEF-SRCP-600) is a device used to measure the circumferential change in a cylindrical specimen inside a triaxial cell in order to calculate the radical strain in the specimen.

 

The DEF-S1600 deformation device is composed of two, three, or four DEF-S1610 Axial Deformation Gages and one or two DEF-SRCP-600 circumferential deformation gages. Each DEF-S1610 includes one LVDT holder with a 150 mm radius, one road extension holder with the same radius, and one rod extension for measuring the axial strains.

 

This device measures the axial strains within the middle half of the specimen height to avoid platen end effects. The two holders are attached to the specimen using tension springs and are guided by a precision bearing and light shaft to maintain parallelism. Different size extension rods are available from GCTS to measure axial deformation over different gage lengths.

 

Several DEF-S1610 devices can be installed in one specimen to measure the average axial deformation. A minimum of two DEF-S1610 located at 180 degrees from each other should be used.

 

The standard DEF-SRCP-600 device includes a 10 mm (0.4 inch) range water-submersible LVDT. This LVDT can be positioned in three different locations on the device to provide three different deformation ranges. These 3 different mechanical ranges translate roughly to 10%, 2.5% and 1% radial strain ranges on a 300 mm diameter specimen.

 

DEF-S1610
Range. . . . . . . . . . 25 mm
Excitation . . . . . . . 5 Volt RMS @ 3 kHz AC
Output (typ) . . . . . 80 mV/V/mm
Repeatability . . . . 1.0 micron *

DEF-SRCP-600
Range 1 . . . . . . . . 100 mm
Range 2 . . . . . . . . 25 mm
Range 3 . . . . . . . . 10 mm
Excitation . . . . . . . 5 Volt RMS @ 3 kHz AC
Output (typ) . . . . . 80 mV/V/mm
Repeatability . . . . 1.0 micron *

*Note: The repeatability specification is for the LVDT sensor only. The absolute repeatability depends on system mechanics.

Other ranges and outputs available. Consult factory for specifications.