Axial strain measures how a material stretches or compresses as a result of a linear force in the horizontal direction.
Bending strain measures a stretch on one side of a material and the contraction on the opposite side due to the linear force applied in the vertical direction
Two different equipment are available to measure the specimen axial displacement:
- Dial gauges (manual readings) or:
- Displacement transducers (automatic readings)
Dial Gauges (manual readings)
S377 Dial gauge, 25x0.01 mm suitable for specimens of max. dimensions 50x100 mm
S379 Dial gauge, 50x0.01 mm suitable for specimens of max. dimensions 70x140 mm
S383 Dial gauge, 25.4x0.001 mm with RS 232 port for PC connection
Note: For other requirements, dial and digital gauges with different maximum travel and sensibility are also available.
Displacement Transducers (automatic readings)
Electrical devices for automatic readings. Calibration certificate is supplied. Cable, connector and signal conditioner are provided.
Types of Transducers:
Type “A”: Accurate and versatile linear potentiometric displacement transducer,. Indipendent linearity < 0.3% (0.3x10 mm) Max. displacement speed: up to 10 m/s.
Models
S336-11 10 mm travel
S336-12 25 mm travel
S336-14 50 mm travel
S336-13 100 mm travel
Type “B”: Linear Strain Gauge Transducer. It guarantees good repeatability and noise reduction. Full bridge at 350 Ohm Indipendent linearity < 0.1% Standard sensitivity: 2 mV/V
Models
S336-18 5 mm travel
S336-15 10 mm travel
S336-16 25 mm travel
S336-17 50 mm travel
Note: The displacement transducers must be connected to the automatic data acquisition system model S334.
Accessories for displacement Transducers
S336-30 Extension cable 2 metres long
S336-31 Extension cable 5 metres long
S336-32 Extension cable 10 metres long Note: It is recommended to use not more than 10 m of extension cable to avoid noise problems that might occur.
S335-15 Universal coupling pliers to hold the transducer/dial gauge. It fits all Matest displacement transducers and dial gauges (from Ø 8 mm to 20 mm).
S305-05 Mounting device of the universal coupling pliers mod.S335-15 to fix the displacement transducer/dial gauge to the Triaxial Cell mod. S305 or mod. S306
Gauge Blocks. Grade 1
Used to calibrate the linear displacement transducers.
Models
S336-41 Nominal length 5 mm
S336-43 Nominal length 10 mm
S336-45 Nominal length 25 mm
S336-47 Nominal length 50 mm